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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Effect of phase transformation on ductility of additively manufactured Co-28Cr-6Mo alloy: An in situ synchrotron X-ray diffraction study during mechanical testing

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Autor(es):
Antunes, L. H. M. [1] ; Hoyos, J. J. [2] ; Fonseca, E. B. [1] ; Beres, M. [3, 4] ; da Silva Farina, P. F. [1] ; Lopes, E. S. N. [1] ; Jardini, A. L. [3] ; Maciel Filho, R. [3]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Sch Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil
[2] State Univ Ponta Grosso, Mat Engn Dept, Av Gen Carlos Cavalcanti 4748, BR-84030900 Ponta Grossa - Brazil
[3] Univ Estadual Campinas, Fac Chem Engn, Natl Inst Biofabricat, Av Albert Einstein 500, BR-13083852 Campinas, SP - Brazil
[4] Univ Fed Ceara, Dept Met & Mat Engn, Av Humberto Monte, BR-60445554 Fortaleza, CE - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 764, SEP 9 2019.
Citações Web of Science: 1
Resumo

The influence of strain-induced martensitic transformation on the mechanical properties of a Co-28Cr-6Mo alloy produced using the direct metal laser sintering additive manufacturing technique was analyzed. Both the as-built and solution heat-treated (ST) specimens were subjected to conventional tensile tests. Furthermore, X-ray diffraction spectra were simultaneously acquired using a synchrotron light source. In addition, electron backscatter diffraction analysis was performed on the specimens before and after tensile testing. Both techniques revealed the occurrence of the strain-induced gamma-face-centered cubic -> epsilon-hexagonal close-packed phase transformation. The higher microstrain and preferential grain orientation of the as-built specimen favored the onset of the phase transformation. Moreover, the ductility of the ST specimen was significantly higher than that of the as-built specimen. This behavior was attributed to the isotropic properties of the randomly-oriented and equiaxed grains, increase in resistance to necking, and reduction in internal stresses caused by the solution heat treatment. (AU)

Processo FAPESP: 16/09350-2 - Desenvolvimento de implantes customizados em biomateriais metálicos utilizando sinterização direta de metais por laser
Beneficiário:Rubens Maciel Filho
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional