MAURICIO DAVID MARTINS DAS NEVES

Resumo

Graduate at Engenharia Metalúrgica from Centro Universitário da FEI (1982), graduate at Engenharia Civil from Universidade Guarulhos (1998), master's at Mechanical Engineering from Universidade Estadual de Campinas (1986) and PhD at Tecnologia Nuclear Materiais from Universidade de São Paulo (2005). Has experience in Material and Metallurgical Engineering, focusing on Welding, Powder Metallurgy and Additive Manufacturing , acting on the following subjects: welding, microstructure, and powder metallurgy. Is currently a professor of the graduate program at the University of São Paulo. Currently been active in the mechanical and microstructural behavior of metallic biomaterials processed by casting, machining or by powder metallurgy.and additive manufacturing. Published 4 book chapters, 42 articles in specialized journals and 126 works in the annals of events. It has 10 technological products, processes or techniques, 1 with registration. In terms of guidelines completed or in progress, there are 15 master's dissertations and 5 doctoral theses, in addition to supervising 13 scientific initiation works and 22 course completion works in the areas of Mechanical Engineering and Materials / Metallurgical and Civil Engineering. In the last 20 years he participated in 3 research projects and 14 technological development projects. Provides technical consultancy and teaches courses on industrial processes in companies. Participated in several processes of technology transfer to the industry and in several technological developments in partnerships with numerous companies. (Text obtained from the Currículo Lattes on November 17th 2021)


Possui graduação em Engenharia Metalúrgica pelo Centro Universitário da FEI (1982), graduação em Engenharia Civil pela Universidade Guarulhos (1998), mestrado em Engenharia Mecânica pela Universidade Estadual de Campinas (1986) e doutorado em Tecnologia Nuclear- Materiais pelo Instituto de Pesquisas Energéticas e Nucleares (IPEN) da Universidade de São Paulo (2005). Foi pesquisador do IPEN de 1984 até 2018. Iniciou funções de Professor na Faculdade de Engenharia Industrial (FEI) em fevereiro de 1992, encerrando-as em junho de 2020 na disciplina de Soldagem e Estruturas de construção Metálica. Atualmente é professor e orientador credenciado do programa de pós-graduação do Instituto de Pesquisas Energéticas e Nucleares / Universidade de São Paulo e pesquisador voluntário da Comissão Nacional de Energia Nuclear. Tem experiência na área de Engenharia de Materiais/ Metalúrgica, com ênfase em materiais metálicos nos processamentos envolvendo: Soldagem, Metalurgia do Pó e Manufatura Aditiva, além de em caracterização microestrutural e mecânica de componentes fabricados por estas técnicas. Tem atuado na área de processamento, comportamento mecânico e caracterização microestrutural de biomateriais metálicos. Atua na área de ensino e projeto de estruturas metálicas na construção civil. Publicou 4 capítulos de livros, 42 artigos em periódicos especializados e126 trabalhos em anais de eventos. Possui 10 produtos tecnológicos, processos ou técnicas, sendo 1 com registro. Em termos de orientações concluídas ou em andamento são 15 dissertações de mestrado e 5 teses de doutorado, além de ter orientado 13 trabalhos de iniciação científica e 22 trabalhos de conclusão de curso nas áreas Engenharia Mecânica e Engenharia de Materiais/Metalúrgica e Civil. Nos últimos 20 anos participou de 3 projetos de pesquisa e 14 projetos de desenvolvimento tecnológico. Presta consultoria técnica e ministra cursos sobre processos industriais em empresas. Participou de diversos processos de transferência tecnológica à indústria e de diversos desenvolvimentos tecnológicos em parcerias com inúmeras empresas. (Texto extraído do Currículo Lattes em 17 nov. 2021)

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Agora exibindo 1 - 10 de 36
  • Artigo IPEN-doc 30213
    Fracture toughness of vacuum sintered AISI M3:2 high speed steels
    2023 - SILVA JUNIOR, MOISES E. da; SILVA, WANDERSON S. da; NEVES, MAURICIO D.M. das; GOLDENSTEIN, HELIO; ARAUJO FILHO, OSCAR O. de
    The aim of this investigation was to study and evaluate the fracture toughness (KICV) of an AISI M3:2 high speed steel that was prepared by powder metallurgical processing, which consisted of uniaxial cold compaction of irregularly shaped water atomized powders, without and with 0.3% of carbon in the form of graphite, followed by vacuum sintering to obtain compacts with densities close to its theoretical value. The sintered steels were then hardened by austenitizing, quenching and triple tempering. Chevron fracture toughness test samples were prepared from the compacts and the tests conducted to determine KICV. The microstructures of the specimens were examined by scanning electron microscopy (SEM), and the composition of the phases determined by x-ray diffraction analysis (XRD). The sizes of the primary carbides and of the austenite grains were determined using Quantikov digital analysis software. No significant difference in fracture toughness (KICV) between the two high speed steels AISI M3:2, austenitized at the different temperatures, was observed.
  • Artigo IPEN-doc 27403
    AISI 310 stainless steel formed by gelcasting
    2020 - OLIVEIRA, LOUISE F.R.; NEVES, MAURICIO D.M. das; ORTEGA, FERNANDO dos S.
    This work evaluates the microstructure and the yield strength under compression at room temperature and at 800°C of specimens prepared with AISI 310 stainless steel powder (D50 = 10 μm), manufactured by gelcasting. Parts were vacuum sintered in a single batch at 1280°C. At room temperature, specimens presented average yield strength of 270 MPa, and at 800°C, 105 MPa. Microstructure analysis involved the measurement of grain size along the vertical axis of cylindrical specimens, with special attention to the effect of particles settling, and was conducted using scanning electron and optical microscopy, and X-ray diffraction. Settling effect was assessed considering the position where the specimen was taken and was negligible: both density and yield strength did not vary significantly along the vertical axis.
  • Artigo IPEN-doc 24669
    Investigation of mechanical, microstructural and thermal behavior of CoCrMo alloy manufactured by selective laser melting and casting techniques
    2017 - MERGULHAO, MARCELLO V.; PODESTA, CARLOS E.; NEVES, MAURICIO D.M. das
    A route of increasing development in additive manufacturing (3D printing) process using metal alloys is the selective laser melting (SLM). 3D building components is possible by laser power that completely melts the metal powder particles. SLM was applied in a biomaterial of CoCrMo alloy, to study the mechanical properties and microstructural characterization in comparison of the conventional technique – lost wax casting. The gas atomized powder was investigated by their physical (as apparent density, bulk density and flow rate) and chemical properties (X-ray fluorescence). Standard samples evaluated the mechanical properties as yield strength, elongation, elastic modulus, transverse rupture strength and the Vickers hardness. Microstructural characterization was performed using optical microscope (OM) and scanning electron microscope (SEM-EDS). Thermal analysis of CoCrMo alloy were investigated using thermomechanical analysis (TMA) and differential scanning calorimetry (DSC) techniques. The results of mechanical properties showed higher values in the SLM specimens compared with the obtained in the cast specimens. The micrographs revealed a typical morphology of consolidation process, characterized by selected layer used in the SLM technique and the dendrites arms in the casting technique. The thermal results confirm the phase’s transitions of CoCrMo alloy.
  • Artigo IPEN-doc 23153
    Production and characterization of porous titanium applied in biomaterial
    2017 - BOMFIM, PAMELA K.S.; CRUZ, ISRAEL A.; FREDERICCI, CATIA; NEVES, MAURICIO D.M.
    The development of materials with a porous titanium surface has been widely studied in the field of biomaterials due to the excellent biocompatibility, high corrosion resistance and combination of high strength with low density. Another relevant fact is that porosity allows bone tissue growth. However, the high reactivity in liquid state ends up hindering titanium fusion, so an alternative is the powder metallurgy (PM).The aim of this work was to produce porous titanium samples by conventional PM. Porous samples was characterized by porosity and microstructure (optical microscopy - OP and scanning electron microscopy SEM), crystaline phase (X-ray diffraction –XRD), mechanical properties (three point bending test) and cytotoxic test. The results showed the presence of alpha phase, a decrease in the elasticity modulus, increase in average pore size and samples exhibited no toxic effects.
  • Artigo IPEN-doc 23179
    Mechanical properties and microstructural characterization of Cobalt-Chromium (CoCr) obtained by casting and Selective Laser Melting (SLM)
    2017 - MERGULHAO, MARCELLO V.; PODESTA, CARLOS E.; NEVES, MAURICIO D.M. das
    The aim of this study is the consolidation of Cobalt-Chromium (CoCr) alloy powder using the additive manufacturing - selective laser melting (SLM) and the investment casting techniques. The research of this study has been applied to their biomaterial applied to development of prosthesis and dental implants. The gas atomized powder are spherical (mean diameter equal to 42,74 μm) and was analyzed by their physical and chemical properties. The microstructure of the powder and specimens was evaluated using optical microscope (OM) and scanning electron microscope with energy-dispersed X-ray spectroscopy (SEM-EDS). The mechanical properties were evaluated of standard samples using a tensile (yield strength, maximum tensile, rupture tensile and elongation), three point bending (transverse rupture strength) and micro hardness tests. The mechanical results indicate higher values for the SLM than casting specimens. The micrographs revealed a characteristic morphology of laser been used in the SLM technique and the dendrites in the casting technique. The microstructure of samples made by SLM is thinner than the samples obtained in the cast.
  • Artigo IPEN-doc 23180
    Valuation of mechanical properties and microstructural characterization of ASTM F75 Co-Cr alloy obtained by Selective Laser Melting (SLM) and casting techniques
    2017 - MERGULHAO, MARCELLO V.; PODESTA, CARLOS E.; NEVES, MAURICIO D.M. das
    Advances in processes using the powder metallurgy techniques are making this technology competitive compared to the other traditional manufacturing processes, especially in medicine area. The additive rapid prototyping technique – selective laser melting (SLM) was applied in a biomaterial of CoCrMoFe alloy (ASTM F75), to study the mechanical properties and microstructural characterization in comparison between the conventional technique – casting. The gas atomized powder was investigated by their physical (as apparent density, bulk density and flow rate) and the chemical properties. The powder was analyzed using scanning electron microscope with energy-dispersed X-ray spectroscopy (SEM-EDS) and X-ray fluorescence. Specimens of standard samples were manufactured using these techniques to evaluate the mechanical properties as uniaxial tensile (yield strength, rupture tensile and elongation), transverse rupture strength and the micro hardness. The mechanical properties showed higher values in the SLM specimens than the casting specimens. Before the mechanical tests the specimens were examined using optical microscope (OM) and SEM-EDS. The micrographs revealed a microstructure with finer morphology in the SLM technique and the dendrites in the casting technique.
  • Artigo IPEN-doc 22775
    Comparison of mechanical properties and microstructural characterization of CoCrMo alloy obtained via selective laser melting (SLM) and casting technique
    2016 - MERGULHAO, M.V.; PODESTA, C.E.; NEVES, M.D.M.
    Advances in processes using the powder metallurgy techniques are making this technology competitive compared to the other traditional manufacturing processes, especially in medicine area. The additive manufacturing technique – selective laser melting (SLM) was applied in a biomaterial of CoCrMo alloy (ASTMF75), to study the mechanical properties and microstructural characterization in comparison between the conventional technique – lost wax casting. Yet there is an important knowledge of performance properties, dimensional, mechanical and microstructural of this sintered alloy compared to casting, as reported recently (MERGULHÃO et al., 2015a, 2015b; PODESTÁ et al., 2015). The aim of this study is to demonstrate the mechanical properties and microstructures of specimens manufactured by powder metallurgy techniques using the SLM, using the Co-Cr-Mo alloy in the form of particulate matter.
  • Artigo IPEN-doc 22137
    Production and characterization of porous titaniumm applied in biomaterials
    2015 - BOMFIM, PAMELA K.S.; CRUZ, ISRAEL A.; FREDERECCI, CATIA; NEVES, MAURICIO D.M.
  • Artigo IPEN-doc 22135
    Evaluating corrosion behaviour of porous titanium in artificial saliva
    2015 - BONFIM, PAMELA K.S.; SANTOS, CELIA A.L.; NEVES, MAURICIO D.M.
  • Artigo IPEN-doc 20460
    Development of titanium dental implants using techniques of powder metallurgy
    2014 - BOMFIM, PAMELA K. dos S.; CIUCCIO, RICARDO; NEVES, MAURICIO D.M. das