{"id":2108,"date":"2021-08-31T11:39:12","date_gmt":"2021-08-31T14:39:12","guid":{"rendered":"https:\/\/www1.eesc.usp.br\/smm\/?page_id=2108"},"modified":"2023-10-17T16:57:29","modified_gmt":"2023-10-17T19:57:29","slug":"professor-haroldo-cavalcanti-pinto","status":"publish","type":"page","link":"https:\/\/smm.eesc.usp.br\/?page_id=2108","title":{"rendered":"Professor &#8211; Haroldo Cavalcanti Pinto"},"content":{"rendered":"\n<div class=\"wp-block-uagb-team uagb-team__image-position-left uagb-team__align-left uagb-team__stack-tablet uagb-block-148ec0bb\"><img loading=\"lazy\" decoding=\"async\" class=\"uagb-team__image-crop-circle\" src=\"https:\/\/smm.eesc.usp.br\/wp-content\/uploads\/Foto-Haroldo-Cavalcanti-Pinto-150x150.png\" alt=\"\" height=\"200\" width=\"200\" loading=\"lazy\"\/><div class=\"uagb-team__content\"><h3 class=\"uagb-team__title\">Haroldo Cavalcanti Pinto<\/h3><span class=\"uagb-team__prefix\">Professor Associado<\/span><p class=\"uagb-team__desc\">\u00c1rea de atua\u00e7\u00e3o: materiais met\u00e1licos.<br>Grupo de pesquisa (Group\/Lab): <a href=\"https:\/\/uspmulti.prp.usp.br\/public\/centrais\/75\">CEPAME<\/a><br>E-mail: haroldo@sc.usp.br<br>ORCID: <a href=\"https:\/\/orcid.org\/0000-0002-8007-5832\">https:\/\/orcid.org\/0000-0002-8007-5832<\/a><br>Scopus Autor ID: <a href=\"https:\/\/orcid.org\/0000-0002-8007-5832\">56250869300<\/a><br><a href=\"http:\/\/lattes.cnpq.br\/2418539772024741\">Curriculo Lattes<\/a><br><\/p><\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-tabs uagb-block-0300d6c0 uagb-tabs__wrap uagb-tabs__hstyle1-desktop uagb-tabs__vstyle6-tablet uagb-tabs__stack1-mobile\" data-tab-active=\"0\"><ul class=\"uagb-tabs__panel uagb-tabs__align-left\" role=\"tablist\"><li class=\"uagb-tab uagb-tabs__active\" role=\"none\"><a href=\"#uagb-tabs__tab0\" class=\"uagb-tabs-list uagb-tabs__icon-position-left\" data-tab=\"0\" role=\"tab\">Perfil<\/a><\/li><li class=\"uagb-tab \" role=\"none\"><a href=\"#uagb-tabs__tab1\" class=\"uagb-tabs-list uagb-tabs__icon-position-left\" data-tab=\"1\" role=\"tab\">Profile<\/a><\/li><li class=\"uagb-tab \" role=\"none\"><a href=\"#uagb-tabs__tab2\" class=\"uagb-tabs-list uagb-tabs__icon-position-left\" data-tab=\"2\" role=\"tab\">Pesquisa \/ Researtch<\/a><\/li><\/ul><div class=\"uagb-tabs__body-wrap\">\n<div class=\"wp-block-uagb-tabs-child uagb-tabs__body-container uagb-inner-tab-0\" aria-labelledby=\"uagb-tabs__tab0\">\n<p>Possui gradua\u00e7\u00e3o (2001) e doutorado (2005) em Eng. Metal\u00fargica e de Materiais pela Technische Universit\u00e4t Berlin, na Alemanha. Realizou P\u00f3s-Doutorado no Instituto de Ci\u00eancia e Tecnologia dos Materiais da Technische Universit\u00e4t Wien, em Viena, na Austria. Liderou por quase 04 anos (2006-2009) um Grupo de Pesquisa na \u00e1rea de Propriedades Mec\u00e2nicas e Caracteriza\u00e7\u00e3o N\u00e3o-Destrutiva de Materiais por Difra\u00e7\u00e3o de raios-X no Max-Planck Institut f\u00fcr Eisenforschung, em D\u00fcsseldorf, na Alemanha. \u00c9 Professor Livre Docente (MS-5.3) na \u00e1rea de Metalurgia F\u00edsica do Departamento de Engenharia de Materiais (SMM) da Escola de Engenharia de S\u00e3o Carlos (EESC) da Universidade de S\u00e3o Paulo (USP), campus S\u00e3o Carlos. Desde Agosto de 2021, realiza um per\u00edodo sab\u00e1tico de 12 meses como Professor Visitante no MikroTribologie Centrum \u03bcTC do Karlsruher Institut f\u00fcr Technologie (KIT) na Alemanha, com financiamento da FAPESP e do European Research Council (ERC). \u00c9 orientador com credenciamento pleno em 02 Programas de P\u00f3s-Gradua\u00e7\u00e3o da USP: em Ci\u00eancia e Engenharia de Materiais (Conceito 6 da CAPES) e em Engenharia Mec\u00e2nica (Conceito 5 da CAPES). Coordena o Centro de Pesquisa e An\u00e1lise de Materiais de Engenharia (CEPAME), uma Central de Equipamentos Multiusu\u00e1rios da USP: https:\/\/uspmulti.prp.usp.br\/centrais\/editar_cadastro\/75. O CEPAME atua no estudo da correla\u00e7\u00e3o entre os processos de manufatura dos materiais de engenharia do bin\u00f4mio metal-cer\u00e2mica, as transforma\u00e7\u00f5es de fase e a forma\u00e7\u00e3o da microestrutura, das tens\u00f5es residuais e da textura cristalogr\u00e1fica nos materiais com aplica\u00e7\u00f5es estruturais, tribol\u00f3gicas, biom\u00e9dicas e de armazenamento de hidrog\u00eanio, entre outras. O CEPAME emprega m\u00e9todos avan\u00e7ados de caracteriza\u00e7\u00e3o, tais como t\u00e9cnicas in-situ com luz sincrotron e a difra\u00e7\u00e3o de raios-X e de el\u00e9trons, para elucidar e compreender as correla\u00e7\u00f5es entre a composi\u00e7\u00e3o, a estrutura, a manufatura e as propriedades dos materiais, recobrimentos e superf\u00edcies de engenharia. \u00c9 Editor Associado do peri\u00f3dico Frontiers in Materials (JOURNAL IMPACT FACTOR 2020 3.515), section Structural Materials. Atua no Comit\u00ea de Avalia\u00e7\u00e3o de Propostas de Difra\u00e7\u00e3o de Raios-X do LNLS-CNPEM. Em 2021 foi eleito membro do Comit\u00ea de Usu\u00e1rios do LNLS pela Comunidade Brasileira de Engenheiros de Materiais interessados no uso das novas t\u00e9cnicas avan\u00e7adas de caracteriza\u00e7\u00e3o e nas energias mais elevadas dispon\u00edveis na nova fonte de luz s\u00edncrotron brasileira, o SIRIUS. Atua como Revisor em mais de 15 Peri\u00f3dicos Internacionais com JCR. Atua nas \u00e1reas de Processos de Manufatura de materiais met\u00e1licos, Engenharia de Superf\u00edcies, Propriedades Mec\u00e2nicas dos Materiais e Caracteriza\u00e7ao Microestrutural, com \u00eanfase em Metalurgia F\u00edsica, Soldagem, Desgaste, Corros\u00e3o \u00e0 Elevadas Temperaturas e M\u00e9todos de Difra\u00e7\u00e3o com raios-X de laborat\u00f3rio, luz s\u00edncrotron e neutrons, assim como com el\u00e9trons retroespalhados no MEV-FEG.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-tabs-child uagb-tabs__body-container uagb-inner-tab-1\" aria-labelledby=\"uagb-tabs__tab1\">\n<p>Graduated (2001) and Ph.D. (2005) in Metallurgical and Materials Engineering at the Technische Universit\u00e4t Berlin, Germany. He held a Post-Doctoral stage at the Institute of Materials Science and Technology of the Technische Universit\u00e4t Wien, Vienna, Austria. He led for almost 04 years (2006-2009) a Research Group in the field of Mechanical Properties and Non-Destructive Materials Characterization using X-Ray Diffraction at the Max-Planck Institut f\u00fcr Eisenforschung, in D\u00fcsseldorf, Germany. He is Associate Professor, on a tenure track pathway, for the chair of Physical Metallurgy at the Department of Materials Engineering (SMM) at the S\u00e3o Carlos School of Engineering (EESC) of the University of S\u00e3o Paulo (USP), S\u00e3o Carlos campus. Since August 2021, he has been taking a 12-month sabbatical as Visiting Professor at the MikroTribologie Centrum \u03bcTC of the Karlsruher Institut f\u00fcr Technologie (KIT) in Germany, with funding from FAPESP and the European Research Council (ERC). He is a fully accredited advisor in 02 Graduate Programs of the USP: in Materials Science and Engineering (CAPES Concept 6) and Mechanical Engineering (CAPES Concept 5). He coordinates the Center for Research and Analysis of Engineering Materials (CEPAME), a Center for Multiuser Equipments at USP:<\/p>\n\n\n\n<p><a href=\"https:\/\/uspmulti.prp.usp.br\/centrais\/editar_cadastro\/75\">https:\/\/uspmulti.prp.usp.br\/centrais\/editar_cadastro\/75<\/a><\/p>\n\n\n\n<p>CEPAME works on the study of the correlation between the manufacturing processes of engineering materials from the metal-ceramic binomial, the phase transformations and the formation of microstructure, residual stresses and crystallographic texture in materials for structural, tribological, biomedical and hydrogen storage applications, among others. CEPAME employs advanced characterization tools, such as in-situ techniques with synchrotron light as well as lab X-ray and electron diffraction, to elucidate and understand the correlations between the composition, structure, manufacture and properties of engineering materials, coatings and surfaces. He is Associate Editor of the journal Frontiers in Materials (JOURNAL IMPACT FACTOR 2020 3.515), section Structural Materials. He serves on the LNLS-CNPEM\u2019s X-Ray Diffraction Proposal Evaluation Committee. In 2021, he was elected a member of the LNLS Users Committee by the Brazilian Community of Materials Engineers interested in the use of new advanced characterization techniques and the highest energies available in the new Brazilian synchrotron light source, SIRIUS. He serves as a Reviewer in more than 15 International Journals with JCR. He works on the Manufacturing Processes for metallic materials, Surface Engineering, Mechanical and Tribological Properties as well as Microstructural Characterization, with an emphasis on Physical Metallurgy, Welding, Wear, High-Temperature Corrosion and Diffraction Methods with lab X-rays, synchrotron light and neutrons, as well as with backscattered electron in the FEG-SEM.<\/p>\n\n\n\n<p>.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-tabs-child uagb-tabs__body-container uagb-inner-tab-2\" aria-labelledby=\"uagb-tabs__tab2\">\n<h5 class=\"wp-block-heading\"><strong>2021 \u2013 Atual \u2013&nbsp;Estudos avan\u00e7ados da rela\u00e7\u00e3o microestrutura-propriedade de mono- e multicamadas de Cr-Al-N para a melhoria do desempenho tribol\u00f3gico em motores de combust\u00e3o (Proc.: 2019\/14262-3) (Valor: R$ 11.160,00 + US$ 48.080,34)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: Os filmes CrN e CrAlN s\u00e3o amplamente utilizados em an\u00e9is de pist\u00e3o, a fim de melhorar seu desempenho em motores de combust\u00e3o. Esta aplica\u00e7\u00e3o extensiva \u00e9 corroborada pela sua boa resist\u00eancia \u00e0 oxida\u00e7\u00e3o, elevada dureza, in\u00e9rcia qu\u00edmica e resist\u00eancia ao desgaste. A combina\u00e7\u00e3o de todas essas propriedades \u00e9 altamente atrativa para aplica\u00e7\u00f5es nas ind\u00fastrias de ferramentas, automotiva, aeroespacial e decorativa. Hoje em dia, a melhoria das propriedades mec\u00e2nicas e t\u00e9rmicas de revestimentos de CrN crescidos monoliticamente pode ser alcan\u00e7ada por meio de solu\u00e7\u00e3o solida com diferentes elementos, como o Al. Os m\u00e9todos de PVD para a deposi\u00e7\u00e3o de mono- e multicamadas de Cr-Al-N permitem gerar uma variedade de microestruturas significativas para o desempenho mec\u00e2nico e tribol\u00f3gico de sistemas de revestimento. Em especial, perfis composicionais qu\u00edmicos, distribui\u00e7\u00e3o granulom\u00e9trica, arquitetura do revestimento, tens\u00f5es residuais\/t\u00e9rmicas e a textura cristalogr\u00e1fica permitem otimizar as propriedades mec\u00e2nicas e o desempenho tribol\u00f3gico dos revestimentos \u00e0 base de Cr-Al-N. O objetivo deste projeto \u00e9, portanto, contribuir para o entendimento de como par\u00e2metros espec\u00edficos de deposi\u00e7\u00e3o por DC-MS e HiPIMS determinam microestruturas selecionadas e propriedades mec\u00e2nicas com especial interesse no desempenho\/resposta tribol\u00f3gica de revestimentos \u00e0 base de Cr-Al-N. As mono- e multicamadas \u00e0 base de Cr-Al-N obtidas pelos m\u00e9todos DC-MS e HiPIMS ser\u00e3o depositadas em substratos de a\u00e7o inoxid\u00e1vel e comparadas. Os a\u00e7os inoxid\u00e1veis s\u00e3o escolhidos devido \u00e0 sua diversidade de aplica\u00e7\u00f5es, como matrizes, motores e ferramentas de corte. As microestruturas produzidas por rotas distintas de PVD ser\u00e3o caracterizadas utilizando ferramentas avan\u00e7adas, como GDOES, TKD, EBSD, STEM, tomografia FIB-SEM-EBSD e difra\u00e7\u00e3o de raios-X (DRX) com luz sincrotron. Para avaliar as propriedades mec\u00e2nicas e tribol\u00f3gicas, an\u00e1lises de tens\u00e3o ser\u00e3o realizadas usando DRX e ensaios de desgaste e atrito com a configura\u00e7\u00e3o de esfera sobre disco ser\u00e3o conduzidos em temperatura ambiente e elevadas temperaturas, bem como em ambientes erosivos-corrosivos..<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.<br>Alunos envolvidos: Doutorado: (2).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Christian Greiner \u2013 Integrante.<br>Financiador(es): Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo \u2013 Bolsa.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2018 \u2013 2019 \u2013&nbsp;Thermomechanical processing of emerging metallic materials (Proc.: PROBRAL 88881.143948\/2017-01) (Valor: R$ 200.000,00)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: Advanced high strength (AHS) steels, magnesium and titanium alloys are used for structural elements in transportation and sporting goods. Their advantages are high specific stiffness and strength, particularly under bending loads, assets that go along with the industrial efforts of weight reduction and low emissions. Austenitic stainless steels have a wide range of applications because of their high temperature strength caused by the precipitation of second-phase, along with resistance to carburizing, corrosion and oxidation in different environments. The capability of multiphase alloys to withstand external loads is determined by the mechanical and physical properties of the microstructural components, their thermal\/mechanical stability and their geometrical arrangement. All these parameters vary during production and service. Therefore, physical aspects such as nucleation and growth of phases, grain re-orientation, phase-specific stresses, diffusion controlled morphological changes or bonding of interfaces must be considered to understand the thermomechanical behavior of the alloys. Furthermore, microstructural features influence the stress partition between phases, stress localization as well as possible damage nucleation and evolution. The sensitivity of the mechanical properties to microstructural changes in structural steels, magnesium and titanium alloys has been studied and reported but new insights can be gained nowadays due to the advance of modern characterisation methods that allow to observe the evolution of the microstructure in-situ and\/or three-dimensionally. In order to improve the mechanical properties of such alloys, hot forming processes have been studied for grain refinement. They promote microstructural modification due to dynamic recrystalization and texture evolution. Besides this, the thermomechanical effect during hot stamping, in which the tool is cooled during the forming step, is another aspect that must be taken into account since this has been largely used and studied mainly in the automotive industries. This project concentrates on the investigation of the formation and evolution of 3D multiphase arrangements, phase-specific texture and stresses in selected Nb-microalloyed steels, magnesium and titanium alloys during thermomechanical treatments, thus aiming at controlling their microstructure and thermomechanical response. This requires the use of computational thermodynamics to pre-screen potential alloying elements for iron systems, advanced 3D high-resolution imaging methods to reveal the architecture of the alloys and in-situ synchrotron X-ray diffraction combined with a Gleeble simulator at the XTMS beamline of LNLS to follow the formation and evolution of microstructural phases as well as their specific preferential grain orientations and stresses during different thermomechanical processes.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Alunos envolvidos: Doutorado: (6).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Rodrigo S. Coelho \u2013 Integrante \/ Soldera, Flavio \u2013 Integrante \/ M\u00fccklich, Frank \u2013 Integrante \/ Pedro Paiva Brito \u2013 Integrante.<br>Financiador(es): CAPES \u2013 Centro Anhanguera de Promo\u00e7\u00e3o e Educa\u00e7\u00e3o Social \u2013 Coopera\u00e7\u00e3o.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2017 \u2013 2020 \u2013&nbsp;Propriedades estruturais e tribol\u00f3gicas de mono- e multicamadas cer\u00e2micas contendo Cr e Al obtidas pelo processo High Power Impulse Magnetron Sputtering (Proc.: 409545\/2016-3) (Valor: R$ 43.000,00)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: O objetivo deste projeto \u00e9 o desenvolvimento de camadas de recobrimento \u00e0 base de CrN e Cr1-XAlXN a serem depositadas sobre substrato de a\u00e7o inoxid\u00e1vel martens\u00edtico 440 nitretado utilizando o processo de deposi\u00e7\u00e3o HiPIMS (High Power Impulse Magnetron Sputtering). Os substratos foram fornecidos pela empresa MAHLE Metal Leve, interessada neste desenvolvimento. O desafio em se estabelecer o processo HiPIMS est\u00e1 relacionado \u00e0 sua maior complexidade, que se deve ao maior n\u00famero de par\u00e2metros envolvidos, se comparado ao processo comercial de vaporiza\u00e7\u00e3o por arco cat\u00f3dico. Enquanto na vaporiza\u00e7\u00e3o por arco cat\u00f3dico a deposi\u00e7\u00e3o \u00e9 determinada principalmente pela corrente de descarga, a tecnologia HiPIMS requer a otimiza\u00e7\u00e3o da forma de pulsa\u00e7\u00e3o da fonte de pot\u00eancia. Isso inclui o ajuste da configura\u00e7\u00e3o de tempos de polariza\u00e7\u00e3o (ton) e despolariza\u00e7\u00e3o (toff) dos alvos, assim como da corrente de pico para cada pot\u00eancia m\u00e9dia aplicada no alvo, al\u00e9m dos par\u00e2metros comuns aos processos de deposi\u00e7\u00e3o f\u00edsica, tais como press\u00f5es parciais de g\u00e1s no reator, temperatura e polariza\u00e7\u00e3o negativa (bias) do substrato. O m\u00e9todo de deposi\u00e7\u00e3o f\u00edsica HiPIMS possibilita a obten\u00e7\u00e3o de compostos com alta pureza e controle estrutural, tanto no n\u00edvel at\u00f4mico como na escala nanom\u00e9trica. O ajuste preciso dos par\u00e2metros de processo permite a deposi\u00e7\u00e3o de monocamadas, multicamadas, nanocomp\u00f3sitos, nanoestruturas funcionalizadas e part\u00edculas para diversas aplica\u00e7\u00f5es. Atualmente, os nitretos de metais de transi\u00e7\u00e3o t\u00eam sido muito estudados para aplica\u00e7\u00f5es que requerem resist\u00eancia ao atrito, ao desgaste, \u00e0 corros\u00e3o e \u00e0 oxida\u00e7\u00e3o. Dentre estes compostos, o nitreto de cromo (CrN) se destaca por possuir grande import\u00e2ncia tecnol\u00f3gica. Suas propriedades mec\u00e2nicas e tribol\u00f3gicas e sua relativa facilidade de deposi\u00e7\u00e3o faz deste material \u00fanico para diversos usos, como recobrimentos duros e, mais recentemente, implantes m\u00e9dicos. A pesquisa proposta neste projeto consiste no desenvolvimento do processo HiPIMS para a deposi\u00e7\u00e3o de filmes de CrN e Cr1-XAlXN, al\u00e9m de multicamadas de CrN\/ Cr1-XAlXN com superestrutura com o objetivo de obter recobrimentos duros e nanoestruturados com elevada \u00e1rea interfacial e boa tenacidade, utilizando alvos met\u00e1licos de Cr e ligas de CrAl (50-50, 30-70, 70-30%at), al\u00e9m de misturas gasosas de nitrog\u00eanio e arg\u00f4nio como precursores dos recobrimentos. As camadas obtidas ser\u00e3o caracterizadas por uma combina\u00e7\u00e3o de diversas t\u00e9cnicas, tais como Difra\u00e7\u00e3o de Raio-X, MEV-EDS-EBSD, MET, AFM, XPS, perfilometria \u00f3ptica, nanodureza instrumentada e testes de riscamento e desgaste, a partir das quais ser\u00e1 poss\u00edvel correlacionar as propriedades mec\u00e2nicas e tribol\u00f3gicas com a micro e a nano estrutura do recobrimento depositado.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Alunos envolvidos: Gradua\u00e7\u00e3o: (2) \/ Mestrado acad\u00eamico: (1) \/ Doutorado: (1).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Fernando Alvarez \u2013 Integrante \/ Alisson Mendes Rodrigues \u2013 Integrante \/ Viviane Oliveira Soares \u2013 Integrante.<br>Financiador(es): Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2015 \u2013 2019 \u2013&nbsp;CREATe-Network: Processing and Characterization of Advanced Composites for Resource-Efficient Applications and Technologies<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: CREATe-Net is composed of 3 academic institutions in Europe (Saarland Univ., DE; Technical Univ. of Catalonia, ES; and INM \u2013 Leibniz Institute for New Materials, DE), 3 non-academic institutions in Europe (AB Sandvik Coromant, SE; Steinbeis Research and Innovation Centers, DE; and Nanoforce Ltd., UK), as well as 6 academic partners outside Europe (CSIR \u2013 Council for Scientific and Industrial Research, ZA; Univ. Cat\u00f3lica de Uruguay, UY; Instituto de Investigaciones en Ciencia e Ingenier\u00eda de Materiales, AR; Univ. de Concepci\u00f3n, CL; Univ. de Sao Paulo, BR; and Georgia Institute of Technology, US). The network will cooperate in the field of design, processing and characterization of novel composite materials for resource-efficient applications and environmentally friendly technologies, in particular energy storage, bearings, electrical contacts, and cutting tools. The purpose of the network is to combine different thematic expertises of the academic and industrial network members in the multidisciplinary field of materials science and engineering in order to design new composite materials with superior properties and performance. The expertise of the network includes: a) design by modelling at different scales (e. g. atomistic modelling, thermodynamic and kinetic modelling, finite element modelling); b) novel processing methods (e . g. atomic layer deposition, severe plastic deformation and rapid solidification); c) advanced characterization methods (e. g. serial sectioning and atom probe tomography, high resolution transmission electron microscopy); d) processing\/characterization of carbon materials, metal and ceramic matrix composites as well as functionally graded materials; and e) performance testing for targeted applications (available through special designed testing facilities at the research centres and industrial partners). Two workshops and one final conference will contribute to the exchange of knowledge beside the exchange of researchers.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Integrante \/ F. M\u00fccklich \u2013 Coordenador \/ Soldera, Flavio \u2013 Integrante \/ Jos\u00e9 Garc\u00eda \u2013 Integrante.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2014 \u2013 2017 \u2013&nbsp;Microstructural engineering of structural light alloys (Proc.: 407399\/2013-5) (Valor: R$ 140.800,00)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: The proposed project concentrates on the investigation of the formation and evolution of three-dimensional multiphase arrangements of selected structural aluminium, magnesium and titanium alloys during thermal and\/or thermo-mechanical treatments aiming at controlling their microstructure and, consequently, their thermo-mechanical behaviour. This will require the use of state-of-the-art ex situ and in situ 3D imaging methods to reveal the internal architecture of the alloys together with in situ bulk diffraction methods to follow the formation and evolution of microstructural phases as well as their evolution and load carrying capability during different loading conditions.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Guillermo Carlos Requena \u2013 Integrante.<\/p>\n\n\n\n<p>Financiador(es): Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico \u2013 Coopera\u00e7\u00e3o.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2011 \u2013 Atual \u2013&nbsp;N\u00facleo de Apoio \u00e0 Pesquisa em Materiais Avan\u00e7ados (NAP-MA) da USP (Valor: R$ 900.000,00)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: A miss\u00e3o do NAP-MA \u00e9 criar um ambiente inter e multidisciplinar e de intensa colabora\u00e7\u00e3o de pesquisa, desenvolvimento e inova\u00e7\u00e3o em materiais h\u00edbridos, agregando compet\u00eancias nas \u00e1reas de materiais cer\u00e2micas (policristalinas e v\u00edtreas), metais, pol\u00edmeros e comp\u00f3sitos existentes no SMM\/EESC\/USP, mais a capacidade patente desse departamento em ensaios mec\u00e2nicos e tribol\u00f3gicos, e ainda a compet\u00eancia no estudo da f\u00edsica e qu\u00edmica da mat\u00e9ria condensada do Grupo de Crescimento de Cristais e Materiais Cer\u00e2micos do IFSC\/USP, para o estudo e desenvolvimento de materiais envolvendo suas inter-rela\u00e7\u00f5es, tanto na etapa de processamento como na gera\u00e7\u00e3o de materiais h\u00edbridos propriamente ditos, com propriedades superiores.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Integrante \/ Ant\u00f4nio Carlos Hernandes \u2013 Coordenador \/ Ant\u00f4nio Jos\u00e9 Felix de Carvalho \u2013 Integrante \/ Vera L\u00facia Arantes \u2013 Integrante \/ Rafael Salom\u00e3o \u2013 Integrante \/ Marcelo A. Chinelatto \u2013 Integrante \/ M\u00e1rcia Cristina Branciforti \u2013 Integrante \/ Eduardo Bellini Ferreira \u2013 Integrante.<br>Financiador(es): Universidade de S\u00e3o Paulo \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2011 \u2013 2015 \u2013&nbsp;Jun\u00e7\u00e3o por Fric\u00e7\u00e3o e Mistura Mec\u00e2nica em Ligas Tixofundidas de Magn\u00e9sio de Alto Desempenho (Proc.: 2010\/11391-2) (Valor: R$ 168.648,20 + US$ 232.322,17)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: O presente projeto tem como objetivo estudar a soldabilidade por fric\u00e7\u00e3o e mistura mec\u00e2nica (SFMM) de novos materiais leves e recicl\u00e1veis de elevado desempenho \u00e0 base da liga de magn\u00e9sio ZK60 (Mg-6%Zn-1%Zr) modificada com diferentes teores de mischmetal (ZK60-RE): 0.5, 1.5 e 2.5 % em peso. Para a obten\u00e7\u00e3o de tais materiais ainda inexplorados no Brasil prop\u00f5e-se a utiliza\u00e7\u00e3o da fundi\u00e7\u00e3o de semi-s\u00f3lidos sob agita\u00e7\u00e3o mec\u00e2nica, combinada a tratamentos t\u00e9rmicos do tipo T4, T5 ou T6. A liga ZK60 representa uma importante matriz para o desenvolvimento de materiais com aplica\u00e7\u00f5es em estruturas aeron\u00e1uticas mais leves, j\u00e1 que oferece a maior resist\u00eancia mec\u00e2nica espec\u00edfica dentre as ligas de magn\u00e9sio tradicionais, aproximando-se da liga de alum\u00ednio 7075. A sua modifica\u00e7\u00e3o atrav\u00e9s da adi\u00e7\u00e3o de terras raras visa formar intermet\u00e1licos de elevado ponto de fus\u00e3o e estabilidade termoqu\u00edmica necess\u00e1rios ao aumento da resist\u00eancia mec\u00e2nica a temperatura ambiente e tamb\u00e9m a temperaturas mais elevadas; al\u00e9m da resist\u00eancia \u00e0 corros\u00e3o e \u00e0 oxida\u00e7\u00e3o. J\u00e1 o zirc\u00f4nio atua no refino de gr\u00e3o em fundidos de magn\u00e9sio, aumentando o potencial destes materiais para uma moldagem definitiva atrav\u00e9s da fundi\u00e7\u00e3o de semi-s\u00f3lidos. A influ\u00eancia dos par\u00e2metros de fundi\u00e7\u00e3o, tratamento t\u00e9rmico e jun\u00e7\u00e3o ser\u00e1 quantificada na microestrutura, nas propriedades mec\u00e2nicas, no comportamento em meios corrosivos e na oxida\u00e7\u00e3o das ligas e suas juntas soldadas por fric\u00e7\u00e3o e mistura mec\u00e2nica.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Alunos envolvidos: Gradua\u00e7\u00e3o: (3) \/ Doutorado: (1).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Antonio J. Ramirez \u2013 Integrante \/ Ricardo Henrique Buzolin \u2013 Integrante \/ Erenilton Pereira da Silva \u2013 Integrante \/ Larissa Fernandes Batista \u2013 Integrante \/ Bruna Callegari \u2013 Integrante.<br>Financiador(es): Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2010 \u2013 2013 \u2013&nbsp;NanoCom-Network: Advanced Processing and Characterisation of Micro and Nano Composites (Valor: US$ 32.000,00)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: Advanced materials consisting of many constituents such as metal matrix composites, cellular materials, graded materials and eutectic alloys are continuously improved in order to tailor their properties and comply with specific application requirements. These materials are finding more and more technological applications where high performance of materials is required and especially when light weight is an important factor. Composite materials offer unique mechanical and physical properties as a result of the interaction between their constituents but primarily by their geometrical arrangement, i.e. internal architecture. A 3D approach is absolutely necessary to understand how the architectural features influence the physical behaviour of heterogeneous materials. Furthermore, if the 3D architecture resulting from the combination of material constituents is known, this information can be capitalized to design new heterogeneous materials with tailored and high performance properties. In the present project, different processing techniques will be utilised and further developed. Furthermore, new characterisation techniques in all length scales such as FIB-tomography, atom probe tomography, synchrotron tomography and synchrotron XRD will be optimised for the special use in the characterisation of composites. Within the broad field of composite materials in the micro as well as in the nano scale, we will concentrate on the following systems and aspects: 1) Advanced design of highly functionalised carbon nanotubes (CNT) reinforced composites; 2) Advanced design of Al-MMC and effects of interfaces; 3) Advanced production and characterisation of nano-structured bulk metal-ceramic composites; 4) Advanced production and characterisation of nano-structured coatings; 5) MMCs reinforced with diamond particles; 6) Modern and 3D characterisation of MMC.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Alunos envolvidos: Doutorado: (1).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ J. Garcia \u2013 Integrante \/ Waldek Bose Filho \u2013 Integrante \/ Luiz Carlos Casteletti \u2013 Integrante \/ Jos\u00e9 Ricardo Tarpani \u2013 Integrante \/ Marcelo Falc\u00e3o \u2013 Integrante \/ Augusta Isaac Neta Pinto \u2013 Integrante.<br>Financiador(es): Uni\u00e3o Europ\u00e9ia \u2013 Programa FP7 \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2010 \u2013 2012 \u2013&nbsp;Obten\u00e7\u00e3o e caracteriza\u00e7\u00e3o de juntas dissimilares por fric\u00e7\u00e3o e mistura mec\u00e2nica entre a\u00e7os automotivos TWIP e ARBL (Proc.: 474718\/2010-7) (Valor: R$ 40.395,00)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: Trata-se de um projeto tecnol\u00f3gico para estudar a soldabilidade de novos a\u00e7os alto Mn austen\u00edticos com efeito de plasticidade induzida por macla\u00e7\u00e3o (TWIP) com a\u00e7os microligados de alta resist\u00eancia e baixa liga (ARBL) pela tecnologia de fric\u00e7\u00e3o e mistura mec\u00e2nica (Friction Stir Welding). Apesar de reunirem resist\u00eancia mec\u00e2nica extraordin\u00e1ria e grandes alongamentos, os a\u00e7os TWIP imp\u00f5em desafios aos processos convencionais de soldagem por fus\u00e3o, quando considerados para a produ\u00e7\u00e3o de estruturas veiculares leves soldadas sob medida. Isso se deve \u00e0 sua microestrutura austen\u00edtica e ao seu alto teor em elementos de liga, os quais favorecem a forma\u00e7\u00e3o de fases fr\u00e1geis na zona de fus\u00e3o, assim como de elevadas tens\u00f5es residuais no cord\u00e3o de solda e nas zonas termicamente afetadas, durante a uni\u00e3o com a\u00e7os comerciais de baixa liga e predominantemente ferr\u00edticos. Tendo em vista que os a\u00e7os TWIP ainda n\u00e3o se encontram dispon\u00edveis comercialmente, ser\u00e3o produzidos em escala laboratorial dois tipos de a\u00e7o TWIP utilizando-se composi\u00e7\u00f5es qu\u00edmicas j\u00e1 bem estabelecidas na literatura cient\u00edfica internacional. A rota de processamento ser\u00e1 aquela utilizada tradicionalmente para a\u00e7os austen\u00edticos inoxid\u00e1veis e tamb\u00e9m documentada na literatura para os a\u00e7os TWIP, i.e. fundi\u00e7\u00e3o seguida de homogeneiza\u00e7\u00e3o e conforma\u00e7\u00e3o mec\u00e2nica a quente por forjamento. J\u00e1 os a\u00e7os ARBL, a serem usados na produ\u00e7\u00e3o das juntas dissimilares, ser\u00e3o duas ligas comerciais para conforma\u00e7\u00e3o a frio fornecidas pela ThyssenKrupp Aceros y Servicios S.A.. As juntas soldadas ser\u00e3o produzidas com dois aportes t\u00e9rmicos distintos, variando-se a velocidade de rota\u00e7\u00e3o da ferramenta. O impacto do aporte t\u00e9rmico na soldagem por fric\u00e7\u00e3o e mistura mec\u00e2nica (SFMM) de a\u00e7os TWIP com a\u00e7os ARBL ser\u00e1 avaliado com rela\u00e7\u00e3o \u00e0s propriedades mec\u00e2nicas das juntas, aos seus gradientes microestruturais, aos aspectos morfol\u00f3gicos das suas superf\u00edcies de fratura, bem como com respeito ao estado de tens\u00f5es residuais.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Alunos envolvidos: Gradua\u00e7\u00e3o: (1) \/ Mestrado acad\u00eamico: (2).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Antonio J. Ramirez \u2013 Integrante \/ Omar Maluf \u2013 Integrante.<br>Financiador(es): Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico \u2013 Aux\u00edlio financeiro.<br>N\u00famero de produ\u00e7\u00f5es C, T &amp; A: 3<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2008 \u2013 2011 \u2013&nbsp;Wear Protecting Nanostructured Coatings for Cutting Processes<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: The productivity as well as the lifetime of cutting tools can be considerably increased by combining suitable technologies to modify the surface of the substrate prior to coating coupled with new multiphase nanostructured coatings. This project is a DFG research grant for German-Brazilian cooperation aiming at understanding the mechanisms of wear, corrosion, phase transformations and damage initiation in novel wear protecting nanocoatings. At MPIE Dr. J. Garcia will guide the production of coatings with tailored microstructures (graded, multilayer and composite) by thermodynamic simulations and cutting tests. Dr. H. Pinto will be responsible for the microstructure and residual stress assessment in the coated tools. The Brazilian partners will pre-treat the substrates by noble gas bombardment (UNICAMP) and characterize the resulting microstructures and residual stresses of the modified substrates (Brazilian Synchrotron Light Laboratory, LNLS).<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ J. Garcia \u2013 Integrante \/ Roosevelt Droppa Jr. \u2013 Integrante \/ Fernando Alvarez \u2013 Integrante.<br>Financiador(es): Deutsche Forschungsgemeinschaft \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2007 \u2013 2009 \u2013&nbsp;Defects and Internal Stresses in Novel Austenitic high-Mn Steels<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: The deformation behavior (TRIP\/TWIP) of austenitic high-Mn steels is influenced by the steel composition and the temperature which change the stacking fault energy (SFE) of the austenitic lattice. In addition to the SFE, the level of deformation and the multiaxiality of the stress state also affect the deformation mechanisms of the austenite. On the other hand, the manufacturing and service of mechanical components from high-Mn steels are accompanied by the formation of macro- as well as micro stresses. The positive and negative effects of macro stresses on the performance of mechanical components are well-known. The impact of micro stresses on damage initiation remains, however, fully unclear. High micro stresses are expected to occur in high-Mn steels due to the thermal expansion mismatch and the differences in mechanical behavior of the phase constituents as well as due to strain-induced phase transformation. Furthermore, the elastic and plastic anisotropy of the austenite associated with texture formation cause inter- and intragranular stresses during forming. This project is part of the collaborative research unit SFB 761 \u2013 Steel ab-initio and focuses therefore on understanding the connection between the evolution of phase composition, defect configurations and internal stresses, and the mechanical behavior of high-Mn steels during uni- and multiaxial loadings.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ C. Barbatti \u2013 Integrante \/ Lucas Amaral Sales \u2013 Integrante.<br>Financiador(es): Deutsche Forschungsgemeinschaft \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2005 \u2013 2010 \u2013&nbsp;Texture, Strain and Stress Development in Oxide Scales<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: The integrity and adherence to substrate of protective oxide scales are impaired by stress generation accompanying the growth of oxides on metallic surfaces. Several mechanisms of stress formation during oxide growth have been proposed over the past years. However, none of those processes can solely explain the internal stress situation in most of the naturally growing oxide scales. This project funded by the FWF, Austria, and the MPIE focuses on the particular influence of substrate orientation and preferential orientation of oxide growth on the internal stress state of multiphase oxide scales. To this end, the time evolution of microstructure, internal stresses and their gradients in oxide scales growing on polycrystals and single crystals of pure iron and FeAl-alloys are studied in-situ during oxidation by energy-dispersive XRD with synchrotron radiation and by complementary electron microscopy.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Alunos envolvidos: Doutorado: (2).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Claudia Juricic \u2013 Integrante \/ P. Brito \u2013 Integrante.<br>Financiador(es): Fonds zur F\u00f6rderung der wissenschaftlichen Forschung \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2005 \u2013 2008 \u2013&nbsp;Induction Assisted Welding Technologies in Steel Utilization<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: HSLA steel grades are required to reduce weight in industrial machinery. Their mechanical performance is impaired by welding operations which often cause a reduction of toughness and increase the probability for cold cracking due to martensite formation in the fusion zone (FZ) and heat-affected zone (HAZ). Induction heating is capable of directly producing heat inside a work piece. This enables the integration of induction heat-treatments into serial welding processes. In this project, the effect of induction-assisted laser welding on the microstructure and residual stresses of HSLA steel joints was investigated within the framework of the EU-project INDUCWELD funded by the Research Fund for Coal and Steel.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Maria Corpas \u2013 Integrante \/ J. A. Guio \u2013 Integrante.<br>Financiador(es): Research Fund for Coal and Steel \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2002 \u2013 2005 \u2013&nbsp;Cryogenic Wear of Austenitic Steels<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: The low temperature technology comprises developments in the space technology and applications of superconductivity. Cryogenic temperatures are encountered e.g. in superconducting magnets and magnetic resonance tomographs, where liquid helium (LHe) is employed as cooling agent, and in the aerospace technology, where liquid hydrogen (LH2) became the standard propellant. Hydrogen represents an important alternative to fossil fuels. The liquefied form, at cryogenic temperatures of about 20K, is particularly attractive due to the possibility of stocking a large quantity of hydrogen within a small volume. In moving machine parts cryogenic temperatures and the presence of hydrogen strongly affect the deformation mechanisms and subsequently component failure. Austenitic stainless steels are materials commonly used in cryotechnology. At extremely low temperatures these steels still exhibit good mechanical properties along with sufficient ductility. However, high mechanical loads combined with low temperatures may induce martensitic transfomation. The formation of martensite within the worn surface enhances strength but also causes embrittlement. This could influence the degradation process of cryogenic machine components and disturbs the superconductive effect due to its ferromagnetism. The aim of this project was the investigation of the influence of temperature, environment and loading conditions on the martensitic transformation and the microstructural deterioration of austenitic stainless steels during cryogenic wear. X-ray diffraction and microscopy studies were carried out on samples worn at room temperature in air with different humidities, at 77 K in LN2, at 20 K in LH2 and at 4.2 K in LHe. Results show that martensitic transformation in austenitic steels can be suppressed by increased Ni-contents or its replacement by Mn. It can be shown that strain induced alpha-martensite does not cause a loss of wear resistance at cryogenic temperatures.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa.<br>Alunos envolvidos: Gradua\u00e7\u00e3o: (2) \/ Doutorado: (1).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Integrante \/ Anke Pyzalla \u2013 Coordenador.<br>Financiador(es): Deutsche Forschungsgemeinschaft \u2013 Aux\u00edlio financeiro.<\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Projetos de desenvolvimento<\/h3>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2013 \u2013 2018 \u2013&nbsp;Recobrimento para An\u00e9is de Pist\u00e3o com durabilidade estendida obtidos atrav\u00e9s de plasma de elevado impulso (Decis\u00e3o Dir. 640\/2012) (Valor: R$ 3.463.708,00)<\/strong><\/h5>\n\n\n\n<p>Descri\u00e7\u00e3o: As tecnologias a serem empregadas nos motores de combust\u00e3o do futuro, devido \u00e0s demandas de minimiza\u00e7\u00e3o de emiss\u00f5es poluentes, usam estrat\u00e9gias de minimiza\u00e7\u00e3o da gera\u00e7\u00e3o dos produtos da combust\u00e3o (poluentes) de forma a piorar consideravelmente a condi\u00e7\u00e3o de trabalho dos an\u00e9is, seja por uma oferta menor de \u00f3leo lubrificante, seja por maiores carregamentos mec\u00e2nicos, seja por maior carregamento t\u00e9rmico seja por utiliza\u00e7\u00e3o de gases contaminados com part\u00edculas abrasivas ou a combina\u00e7\u00e3o destas. Portanto, este projeto, tem como objetivo o desenvolvimento de um material cer\u00e2mico, com elevada resist\u00eancia ao desgaste, a ser aplicado como revestimento protetivo em an\u00e9is de pist\u00e3o para motores de combust\u00e3o interna. Dado o potencial do processo de deposi\u00e7\u00e3o f\u00edsica em fase de vapor via plasma de elevado impulso (High Power Impulse Magnetron Sputtering \u2013 HIPIMS), em termos de nanoestrutura e propriedades das camadas duras, este projeto possui caracter\u00edsticas de inova\u00e7\u00e3o de ruptura com elevado potencial tecnol\u00f3gico, pois no meio industrial n\u00e3o se conhece nenhum caso de aplica\u00e7\u00e3o ou explora\u00e7\u00e3o desta tecnologia no universo da industrial automobil\u00edstica mundial. Visto que a tecnologia de plasma de elevado impulso apresenta atualmente seu auge no meio acad\u00eamico ou est\u00e1 pr\u00f3ximo dele, existe portanto uma lacuna t\u00e9cnica de acesso e dom\u00ednio do processo de deposi\u00e7\u00e3o do material cer\u00e2mico que permita desenvolver os prot\u00f3tipos de teste e, com isto, o desenvolvimento da sua aplica\u00e7\u00e3o e industrializa\u00e7\u00e3o \u00e9 praticamente invi\u00e1vel.<\/p>\n\n\n\n<p>Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Desenvolvimento.<br>Alunos envolvidos: Gradua\u00e7\u00e3o: (2) \/ Doutorado: (2).<br>Integrantes: Haroldo Cavalcanti Pinto \u2013 Coordenador \/ Fernando Alvarez \u2013 Integrante \/ Daniel Wisnivesky \u2013 Integrante \/ Paulo Mordente \u2013 Integrante.<br>Financiador(es): Mahle Metal Leve \u2013 Aux\u00edlio financeiro \/ Banco Nacional de Desenvolvimento Econ\u00f4mico e Social \u2013 Aux\u00edlio financeiro.<br>Research<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2021 \u2013 Current \u2013 Advanced studies of the microstructure-property relationship of Cr-Al-N mono- and multilayers for the improvement of tribological performance in combustion engines (Proc.: 2019\/14262-3) (Budget: R$ 11.160,00 + US$ 48.080,34)<\/strong><\/h5>\n\n\n\n<p>Description: CrN and CrAlN films are widely used in piston rings in order to improve their performance in combustion engines. This extensive application is supported by its good oxidation resistance, high hardness, chemical inertness and wear resistance. The combination of all these properties is highly attractive for applications in the tool, automotive, aerospace and decorative industries. Nowadays, the improvement of the mechanical and thermal properties of monolithically grown CrN coatings can be achieved through solid solution with different elements, such as Al. PVD methods for the deposition of mono- and multi-layers of Cr-Al- N allow to generate a variety of microstructures significant for the mechanical and tribological performance of coating systems. In particular, chemical compositional profiles, particle size distribution, coating architecture, residual\/thermal stresses and crystallographic texture allow to optimize the mechanical properties and tribological performance of coatings based on Cr-Al-N. The aim of this project is, therefore, to contribute to the understanding of how specific deposition parameters by DC-MS and HiPIMS determine selected microstructures and mechanical properties with special interest in the performance\/tribological response of coatings based on Cr-Al-N. The mono- and multilayers based on Cr-Al-N obtained by the DC-MS and HiPIMS methods will be deposited on stainless steel substrates and compared. Stainless steels are chosen because of their diversity of applications, such as dies, motors and cutting tools. The microstructures produced by distinct PVD routes will be characterized using advanced tools such as GDOES, TKD, EBSD, STEM, FIB-SEM-EBSD tomography and X-ray diffraction (DRX) with synchrotron light. To evaluate the mechanical and tribological properties, stress analyzes will be performed using XRD and wear and friction tests with the sphere-on-disk configuration will be conducted at room temperature and elevated temperatures, as well as in erosive-corrosive environments.<\/p>\n\n\n\n<p>Status: In progress; Nature: Research.<br>Students involved: Doctorate: (2).<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Christian Greiner \u2013 Member.<br>Financer(s): S\u00e3o Paulo Research Foundation \u2013 Scholarship.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2018 \u2013 2019 \u2013 Thermomechanical processing of emerging metallic materials (Proc.: PROBRAL 88881.143948\/2017-01) (Budget: R$ 200,000.00)<\/strong><\/h5>\n\n\n\n<p>Description: Advanced high strength (AHS) steels, magnesium and titanium alloys are used for structural elements in transportation and sporting goods. Their advantages are high specific stiffness and strength, particularly under bending loads, assets that go along with the industrial efforts of weight reduction and low emissions. Austenitic stainless steels have a wide range of applications of their high temperature strength caused by the precipitation of second-phase, along with resistance to carburizing, corrosion and oxidation in different environments. The capability of multiphase alloys to withstand external loads is determined by the mechanical and physical properties of the microstructural components, their thermal\/mechanical stability and their geometrical arrangement. All these parameters vary during production and service. Therefore, physical aspects such as nucleation and growth of phases, grain re-orientation, phase-specific stresses, diffusion controlled morphological changes or bonding of interfaces must be considered to understand the thermomechanical behavior of the alloys. Furthermore, microstructural features influence the stress partition between phases, stress localization as well as possible damage nucleation and evolution. The sensitivity of the mechanical properties to microstructural changes in structural steels, magnesium and titanium alloys has been studied and reported but new insights can be gained nowadays due to the advance of modern characterization methods that allow to observe the evolution of the microstructure in-situ and \/or three-dimensionally. In order to improve the mechanical properties of such alloys, hot forming processes have been studied for grain refinement. They promote microstructural modification due to dynamic recrystallization and texture evolution. Besides this, the thermomechanical effect during hot stamping, in which the tool is cooled during the step, is another aspect that must be taken into account since this has been largely used and studied mainly in the automotive industries. This project concentrates on the investigation of the formation and evolution of 3D multiphase arrangements, phase-specific texture and stresses in selected Nb-microalloyed steels, magnesium and titanium alloys during thermomechanical treatments, thus aiming at controlling their microstructure and thermomechanical response. This requires the use of computational thermodynamics to pre-screen potential alloying elements for iron systems, advanced 3D high-resolution imaging methods to reveal the architecture of the alloys and in-situ synchrotron X-ray diffraction combined with a Gleeble simulator at the XTMS beamline of LNLS to follow the formation and evolution of microstructural phases as well as their specific preferential grain orientations and stresses during different thermomechanical processes.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Students involved: Doctorate: (6).<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Rodrigo S. Coelho \u2013 Member \/ Soldera, Flavio \u2013 Member \/ M\u00fccklich, Frank \u2013 Member \/ Pedro Paiva Brito \u2013 Member.<br>Financer(s): CAPES \u2013 Bilateral Cooperation.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2017 \u2013 2020 \u2013 Structural and tribological properties of ceramic mono- and multilayers containing Cr and Al obtained by the High-Power Impulse Magnetron Sputtering process (Proc.: 409545\/2016-3) (Budget: R$ 43,000.00)<\/strong><\/h5>\n\n\n\n<p>Description: The objective of this project is the development of overlay layers based on CrN and Cr(1-X)AlXN to be deposited on nitrided martensitic 440 stainless steel substrates using the HiPIMS (High Power Impulse Magnetron Sputtering) deposition process. The substrates were supplied by the company MAHLE Metal Leve, interested in this development. The challenge in establishing the HiPIMS process is related to its greater complexity, which is due to the greater number of parameters involved, compared to the commercial process of vaporization by cathodic arc. While in cathodic arc vaporization the deposition is mainly determined by the discharge current, the HiPIMS technology requires the optimization of the pulsation form of the power source. This includes adjusting the setting of polarization (ton) and depolarization (toff) times of the targets, as well as the peak current for each average power applied to the target, in addition to parameters common to physical deposition processes, such as partial pressures of gas in the reactor, temperature and negative polarization (bias) of the substrate. The HiPIMS physical deposition method makes it possible to obtain compounds with high purity and structural control, both at the atomic level and at the nanometric scale. Precise adjustment of process parameters allows the deposition of monolayers, multilayers, nanocomposites, functionalized nanostructures and particles for various applications. Currently, transition metal nitrides have been extensively studied for applications that require resistance to friction, wear, corrosion and oxidation. Among these compounds, chromium nitride (CrN) stands out for having great technological importance. Its mechanical and tribological properties and its relative ease of deposition make this material unique for many uses, such as hard coatings and, more recently, medical implants. The research proposed in this project consists in the development of the HiPIMS process for the deposition of CrN and Cr(1-X)AlXN films, in addition to multilayers of CrN\/Cr(1-X)AlXN with superstructure in order to obtain hard and nanostructured coatings with high interfacial area and good toughness , using metallic targets of Cr and CrAl alloys (50-50, 30-70, 70-30%at), in addition to gaseous mixtures of nitrogen and argon as precursors for the coatings. The layers obtained will be characterized by a combination of several techniques, such as X-Ray Diffraction, SEM-EDS-EBSD, MET, AFM, XPS, optical profilometry, instrumented nanohardness and scratch and wear tests, from which it will be possible correlate the mechanical and tribological properties with the micro and nano structure of the deposited coating.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Students involved: Graduation: (2) \/ Academic Master: (1) \/ Doctorate: (1).<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Fernando Alvarez \u2013 Member \/ Alisson Mendes Rodrigues \u2013 Member \/ Viviane Oliveira Soares \u2013 Member.<br>Financier(s): National Council for Scientific and Technological Development \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2015 \u2013 2019 \u2013 CREATe-Network: Processing and Characterization of Advanced Composites for Resource-Efficient Applications and Technologies<\/strong><\/h5>\n\n\n\n<p>Description: CREATe-Net is composed of 3 academic institutions in Europe (Saarland Univ., DE; Technical Univ. of Catalonia, ES; and INM \u2013 Leibniz Institute for New Materials, DE), 3 non-academic institutions in Europe (AB Sandvik Coromant, SE; Steinbeis Research and Innovation Centers, DE; and Nanoforce Ltd., UK), as well as 6 academic partners outside Europe (CSIR \u2013 Council for Scientific and Industrial Research, ZA; Catholic University of Uruguay, UY; Instituto de Investigaciones en Ciencia e Ingenier\u00eda de Materiales, AR; Univ. de Concepci\u00f3n, CL; Univ. de Sao Paulo, BR; and Georgia Institute of Technology, US). The network will cooperate in the field of design, processing and characterization of novel composite materials for resource-efficient applications and environmentally friendly technologies, in particular energy storage, bearings, electrical contacts, and cutting tools. The purpose of the network is to combine different thematic expertise of the academic and industrial network members in the multidisciplinary field of science and engineering materials in order to design new composite materials with superior properties and performance. The expertise of the network includes: a) design by modeling at different scales (eg atomistic modelling, thermodynamic and kinetic modelling, finite element modelling); b) novel processing methods (eg atomic layer deposition, severe plastic deformation and rapid solidification); c) advanced characterization methods (eg serial sectioning and atom probe tomography, high resolution transmission electron microscopy); d) processing\/characterization of carbon materials, metal and ceramic matrix composites as well as functionally graded materials; and e) performance testing for targeted applications (available through special designed testing facilities at the research centers and industrial partners). Two workshops and one final conference will contribute to the exchange of knowledge besides the exchange of researchers.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Members: Haroldo Cavalcanti Pinto \u2013 Member \/ F. M\u00fccklich \u2013 Coordinator \/ Soldera, Flavio \u2013 Member \/ Jos\u00e9 Garc\u00eda \u2013 Member.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2014 \u2013 2017 \u2013 Microstructural engineering of structural light alloys (Proc.: 407399\/2013-5) (Budget: R$ 140,800.00)<\/strong><\/h5>\n\n\n\n<p>Description: The proposed project concentrates on the investigation of the formation and evolution of three-dimensional multiphase arrangements of selected structural aluminum, magnesium and titanium alloys during thermal and\/or thermo-mechanical treatments aiming at controlling their microstructure and, consequently, their thermo- mechanical behavior. This will require the use of state-of-the-art ex situ and in situ 3D imaging methods to reveal the internal architecture of the alloys together with in situ bulk diffraction methods to follow the formation and evolution of microstructural phases as well as their evolution and load carrying capability during different loading conditions.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Guillermo Carlos Requena \u2013 Member.<br>Financer(s): National Council for Scientific and Technological Development \u2013 Cooperation<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2011 \u2013 Current \u2013 Support Center for Research in Advanced Materials (NAP-MA) at USP (Budget: R$ 900,000.00)<\/strong><\/h5>\n\n\n\n<p>Description: The mission of the NAP-MA is to create an inter and multidisciplinary environment and intense collaboration of research, development and innovation in hybrid materials, adding competences in the areas of ceramic materials (polycrystalline and vitreous), metals, polymers and composites existing in the SMM \/EESC\/USP, plus the patent capacity of this department in mechanical and tribological tests, and also the competence in the study of physics and chemistry of condensed matter from the IFSC\/USP\u2019s Crystals and Ceramic Materials Growth Group, for the study and development of materials involving their interrelationships, both in the processing stage and in the generation of hybrid materials themselves, with superior properties.<\/p>\n\n\n\n<p>Status: In progress; Nature: Research.<br>Members: Haroldo Cavalcanti Pinto \u2013 Member \/ Ant\u00f4nio Carlos Hernandes \u2013 Coordinator \/ Ant\u00f4nio Jos\u00e9 Felix de Carvalho \u2013 Member \/ Vera L\u00facia Arantes \u2013 Member \/ Rafael Salom\u00e3o \u2013 Member \/ Marcelo A. Chinelatto \u2013 Member \/ M\u00e1rcia Cristina Branciforti \u2013 Member \/ Eduardo Bellini Ferreira \u2013 Integral.<br>Financier(s): Universidade de S\u00e3o Paulo \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2011 \u2013 2015 \u2013 Friction Joint and Mechanical Mixing in High Performance Thixoformed Magnesium Alloys (Proc.: 2010\/11391-2) (Budget: R$168,648.20 + US$232,322.17)<\/strong><\/h5>\n\n\n\n<p>Description: This project aims to study the friction and mechanical mixing (SFMM) weldability of new lightweight and recyclable materials with high performance based on ZK60 magnesium alloy (Mg-6%Zn-1%Zr) modified with different contents of mischmetal (ZK60-RE): 0.5, 1.5 and 2.5 % by weight. To obtain such materials still unexplored in Brazil, the use of semi-solid casting under mechanical agitation is proposed, combined with thermal treatments of the type T4, T5 or T6. The ZK60 alloy represents an important matrix for the development of materials with applications in lighter aeronautical structures, as it offers the greatest specific mechanical strength among traditional magnesium alloys, approaching the 7075 aluminum alloy. Its modification through addition of rare earths aims to form intermetallics with high melting point and thermochemical stability necessary to increase mechanical strength at room temperature and also at higher temperatures; in addition to resistance to corrosion and oxidation. On the other hand, zirconium acts in the refining of grain in magnesium castings, increasing the potential of these materials for a definitive molding through the casting of semi-solids. The influence of casting, heat treatment and joining parameters will be quantified on the microstructure, mechanical properties, behavior in corrosive media and oxidation of alloys and their welded joints by friction and mechanical mixing.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Students involved: Graduation: (3) \/ Doctorate: (1).<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Antonio J. Ramirez \u2013 Member \/ Ricardo Henrique Buzolin \u2013 Member \/ Erenilton Pereira da Silva \u2013 Member \/ Larissa Fernandes Batista \u2013 Member \/ Bruna Callegari \u2013 Member.<br>Financer(s): S\u00e3o Paulo Research Foundation \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2010 \u2013 2013 \u2013 NanoCom-Network: Advanced Processing and Characterization of Micro and Nano Composites (Budget: US$ 32,000.00)<\/strong><\/h5>\n\n\n\n<p>Description: Advanced materials consisting of many constituents such as metal matrix composites, cellular materials, graded materials and eutectic alloys are continuously improved in order to tailor their properties and comply with specific application requirements. These materials are finding more and more technological applications where high performance of materials is required and especially when light weight is an important factor. Composite materials offer unique mechanical and physical properties as a result of the interaction between their constituents but primarily by their geometrical arrangement, ie internal architecture. A 3D approach is absolutely necessary to understand how the architectural features influence the physical behavior of heterogeneous materials. Furthermore, if the 3D resulting from the combination of constituent material is known, this information can be capitalized to design new heterogeneous materials with tailored and high performance properties. In the present project, different processing techniques will be used and further developed. Furthermore, new characterization techniques in all length scales such as FIB-tomography, atom probe tomography, synchrotron tomography and synchrotron XRD will be optimized for the special use in the characterization of composites. Within the broad field of composite materials in the micro as well as in the nano scale, we will concentrate on the following systems and aspects: 1) Advanced design of highly functionalised carbon nanotubes (CNT) reinforced composites; 2) Advanced design of Al-MMC and effects of interfaces; 3) Advanced production and characterization of nano-structured bulk metal-ceramic composites; 4) Advanced production and characterization of nano-structured coatings; 5) MMCs reinforced with diamond particles; 6) Modern and 3D characterisation of MMC.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Students involved: Doctorate: (1).<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ J. Garcia \u2013 Member \/ Waldek Bose Filho \u2013 Member \/ Luiz Carlos Casteletti \u2013 Member \/ Jos\u00e9 Ricardo Tarpani \u2013 Member \/ Marcelo Falc\u00e3o \u2013 Member \/ Augusta Isaac Neta Pinto \u2013 Member.<br>Financier(s): European Union \u2013 FP7 Program \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2010 \u2013 2012 \u2013 Obtaining and characterization of dissimilar joints by friction and mechanical mixing between TWIP and ARBL automotive steels (Proc.: 474718\/2010-7) (Budget: R$ 40,395.00)<\/strong><\/h5>\n\n\n\n<p>Description: This is a technological project to study the weldability of new austenitic high Mn steels with Maclation Induced Plasticity Effect (TWIP) with microalloyed high strength low alloy steels (ARBL) by friction technology and mechanical mixing (Friction Stir Welding). Despite bringing together extraordinary mechanical strength and large elongations, TWIP steels pose challenges to conventional fusion welding processes when considered for the production of custom welded lightweight vehicle structures. This is due to its austenitic microstructure and its high content of alloying elements, which favor the formation of fragile phases in the melting zone, as well as high residual stresses in the weld bead and in the thermally affected areas, during union with commercial low-alloy and predominantly ferritic steels. Considering that TWIP steels are not yet commercially available, two types of TWIP steel will be produced on a laboratory scale using chemical compositions already well established in the international scientific literature. The processing route will be the one traditionally used for austenitic stainless steels and also documented in the literature for TWIP steels, ie casting followed by homogenization and hot mechanical forming by forging. ARBL steels, to be used in the production of dissimilar joints, will be two commercial alloys for cold forming supplied by ThyssenKrupp Aceros y Servicios SA. The welded joints will be produced with two distinct thermal inputs, varying the tool rotation speed. The impact of heat input on friction welding and mechanical mixing (SFMM) of TWIP steels with ARBL steels will be evaluated in relation to the mechanical properties of the joints, their microstructural gradients, the morphological aspects of their fracture surfaces, as well as with respect to the state of residual stresses.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Students involved: Graduation: (1) \/ Academic Masters: (2).<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Antonio J. Ramirez \u2013 Member \/ Omar Maluf \u2013 Member.<br>Financier(s): National Council for Scientific and Technological Development \u2013 Financial aid.<br>Number of C, T &amp; A productions: 3<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2008 \u2013 2011 \u2013 Wear Protecting Nanostructured Coatings for Cutting Processes<\/strong><\/h5>\n\n\n\n<p>Description: The productivity as well as the lifetime of cutting tools can be considerably increased by combining suitable technologies to modify the surface of the substrate prior to coating coupled with new multiphase nanostructured coatings. This project is a DFG research grant for German-Brazilian cooperation aiming at understanding the mechanisms of wear, corrosion, phase transformations and damage initiation in novel wear protecting nanocoatings. At MPIE Dr. J. Garcia will guide the production of coatings with tailored microstructures (graded, multilayer and composite) by thermodynamic simulations and cutting tests. Dr. H. Pinto will be responsible for the microstructure and residual stress assessment in the coated tools. The Brazilian partners will pre-treat the substrates by noble gas bombardment (UNICAMP) and characterize the resulting microstructures and residual stresses of the modified substrates (Brazilian Synchrotron Light Laboratory, LNLS).<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ J. Garcia \u2013 Member \/ Roosevelt Droppa Jr. \u2013 Member \/ Fernando Alvarez \u2013 Member.<br>Financier(s): Deutsche Forschungsgemeinschaft \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2007 \u2013 2009 \u2013 Defects and Internal Stresses in Novel Austenitic high-Mn Steels<\/strong><\/h5>\n\n\n\n<p>Description: The deformation behavior (TRIP\/TWIP) of the austenitic high-Mn steels is influenced by the steel composition and the temperature which change the stacking fault energy (SFE) of the austenitic lattice. In addition to the SFE, the level of deformation and the multiaxiality of the stress state also affect the deformation mechanisms of the austenite. On the other hand, the manufacturing and service of mechanical components from high-Mn steels are accompanied by the formation of macro- as well as micro stresses. The positive and negative effects of macro stresses on the performance of mechanical components are well-known. The impact of micro stresses on damage initiation remains, however, fully unclear. High micro stresses are expected to occur in high-Mn steels due to thermal expansion mismatch and the differences in mechanical behavior of the phase constituents as well as due to strain-induced phase transformation. Furthermore, the elastic and plastic anisotropy of the austenite associated with texture formation cause inter- and intragranular stresses during forming. This project is part of the collaborative research unit SFB 761 \u2013 Steel ab-initial and focuses on understanding the connection between the evolution of phase composition, defect configurations and internal stresses, and the mechanical behavior of high-Mn steels during uni- and multiaxial loadings.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ C. Barbatti \u2013 Member \/ Lucas Amaral Sales \u2013 Member.<br>Financier(s): Deutsche Forschungsgemeinschaft \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2005 \u2013 2010 \u2013 Texture, Strain and Stress Development in Oxide Scales<\/strong><\/h5>\n\n\n\n<p>Description: The integrity and adherence to substrate of protective oxide scales are impaired by stress generation accompanying the growth of oxides on metallic surfaces. Several mechanisms of stress formation during oxide growth have been proposed over the past years. However, none of those processes can only explain the internal stress situation in most of the naturally growing oxide scales. This project funded by the FWF, Austria, and the MPIE focuses on the particular influence of substrate orientation and preferential orientation of oxide growth on the internal stress state of multiphase oxide scales. To this end, the time evolution of microstructure, internal stresses and their gradients in oxide scales growing on polycrystals and single crystals of pure iron and FeAl-alloys are studied in-situ during oxidation by energy-dispersive XRD with synchrotron radiation and by electron microscopy.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<\/p>\n\n\n\n<p>Students involved: Doctorate: (2).<\/p>\n\n\n\n<p>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Claudia Juricic \u2013 Member \/ P. Brito \u2013 Member.<br>Financer(s): Fonds zur F\u00f6rderung der wissenschaftlichen Forschung \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2005 \u2013 2008 \u2013 Induction Assisted Welding Technologies in Steel Utilization<\/strong><\/h5>\n\n\n\n<p>Description: HSLA steel grades are required to reduce weight in industrial machinery. Their mechanical performance is impaired by welding operations which often cause a reduction of toughness and an increase in the probability of cold cracking due to martensite formation in the fusion zone (FZ) and heat-affected zone (HAZ). Induction heating is capable of directly producing heat inside a work piece. This enables the integration of induction heat-treatments into serial welding processes. In this project, the effect of induction-assisted laser welding on the microstructure and residual stresses of HSLA steel joints was investigated within the framework of the EU-project INDUCWELD funded by the Research Fund for Coal and Steel.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Maria Corpas \u2013 Member \/ JA Guio \u2013 Member.<br>Financier(s): Research Fund for Coal and Steel \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2002 \u2013 2005 \u2013 Cryogenic Wear of Austenitic Steels<\/strong><\/h5>\n\n\n\n<p>Description: The low temperature technology comprises developments in the space technology and applications of superconductivity. Cryogenic temperatures are encountered eg in superconducting magnets and magnetic resonance tomographs, where liquid helium (LHe) is employed as cooling agent, and in the aerospace technology, where liquid hydrogen (LH2) became the standard propellant. Hydrogen represents an important alternative to fossil fuels. The liquefied form, at cryogenic temperatures of about 20K, is particularly attractive due to the possibility of stocking a large quantity of hydrogen within a small volume. In moving machine parts cryogenic temperatures and the presence of hydrogen strongly affect the deformation mechanisms and subsequent component failure. Austenitic stainless steels are commonly used in cryotechnology. At extremely low temperatures these steels still exhibit good mechanical properties along with sufficient ductility. However, high mechanical loads combined with low temperatures may induce martensitic transfomation. The formation of martensite within the worn surface enhances strength but also causes embrittlement. This could influence the degradation process of cryogenic machine components and disturbs the superconductive effect due to its ferromagnetism. The aim of this project was the investigation of the influence of temperature, environment and loading conditions on the martensitic transformation and the microstructural deterioration of austenitic stainless steels during cryogenic wear. X-ray diffraction and microscopy studies were carried out on samples worn at room temperature in air with different humidities, at 77 K in LN2, at 20 K in LH2 and at 4.2 K in LHe. Results show that martensitic transformation in austenitic steels can be suppressed by increased Ni-contents or its replacement by Mn. It can be shown that strain induced alpha-martensite does not cause a loss of wear resistance at cryogenic temperatures.<\/p>\n\n\n\n<p>Status: Completed; Nature: Research.<br>Students involved: Graduation: (2) \/ Doctorate: (1).<br>Members: Haroldo Cavalcanti Pinto \u2013 Member \/ Anke Pyzalla \u2013 Coordinator.<br>Financier(s): Deutsche Forschungsgemeinschaft \u2013 Financial aid.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Development projects<\/strong><\/h3>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2013 \u2013 2018 \u2013 Coating for Piston Rings with extended durability obtained through high impulse plasma (Decision Dir. 640\/2012) (Budget: R$ 3,463,708.00)<\/strong><\/h5>\n\n\n\n<p>Description: The technologies to be used in the combustion engines of the future, due to the demands to minimize pollutant emissions, use strategies to minimize the generation of combustion products (pollutants) in order to considerably worsen the working condition of the rings, either by a smaller supply of lubricating oil, either due to greater mechanical loading, or due to greater thermal loading, or the use of gases contaminated with abrasive particles, or a combination of these. Therefore, this project aims to develop a ceramic material, with high wear resistance, to be applied as a protective coating on piston rings for internal combustion engines. Given the potential of the physical vapor deposition process via high impulse plasma (High Power Impulse Magnetron Sputtering \u2013 HIPIMS), in terms of nanostructure and hard layer properties, this project has innovative breakthrough characteristics with high technological potential, because in the industrial environment there is no known case of application or exploitation of this technology in the world of the automobile industry worldwide. Since high-pulse plasma technology is currently at its peak in academia or is close to it, there is therefore a technical gap in accessing and mastering the ceramic material deposition process that allows the development of test prototypes and, with this, the development of its application and industrialization is practically unfeasible.<\/p>\n\n\n\n<p>Status: Completed; Nature: Development.<br>Students involved: Graduation: (2) \/ Doctorate: (2).<br>Members: Haroldo Cavalcanti Pinto \u2013 Coordinator \/ Fernando Alvarez \u2013 Member \/ Daniel Wisnivesky \u2013 Member \/ Paulo Mordente \u2013 Member.<br>Financier(s): Mahle Metal Leve \u2013 Financial aid \/ National Bank for Economic and Social Development \u2013 Financial aid.<\/p>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":3502,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"no-sidebar","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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