Use este identificador para citar ou linkar para este item: http://www.repositorio.ufc.br/handle/riufc/22459
Título: Texture and grain boundary study in high strength Fe–18Ni–Co steel related to hydrogen embrittlement
Autor(es): Masoumi, Mohammad
Santos, Luis P. M.
Bastos, Ivan N.
Tavares, Sérgio Souto Maior
Silva, Marcello José Gomes da
Abreu, Hamilton Ferreira Gomes de
Palavras-chave: Crystallographic texture
Slow strain rate tests
Crack propagation
Ciência dos materiais
Materiais - Deformações
Patologias na construção civil
Fissura (Engenharia Civil) - Propagação
Resistência de materiais
Data do documento: 2016
Editor: Materials and Design
Citação: MASOUMI, M.; SANTOS, L. P. M.; BASTOS, I. N.; TAVARES, S. S. M.; SILVA, M. J. G.; ABREU, H. F. G. (2016)
Abstract: Crystallographic texture and grain–boundary distribution are introduced as a newmethod of reducing susceptibility to crack formation and propagation. In thiswork, slowstrain rate tests (SSRT)were performed on fullymartensitic ultra-high strength Fe–18Ni–Co steel in 0.6 M NaCl atmosphere at −1.2 VSCE to investigate hydrogen embrittlement (HE). Micro and meso-texture in both crack stricken and crack free regions were characterized using electron backscattering diffraction (EBSD) technique, to find a pattern between crystallographic orientation and HE susceptibility. The Taylor factor analysiswas used to determine the grains with higher susceptibility to crack initiation and propagation. The results showed that cracks can initiate and propagate through b100N// NDoriented grains,while {111} and {110}//NDfibers indicate higher resistance path for crack propagation.Moreover, the high amount of deformed fraction with high stored energy acts as one of the main reasons for high susceptibility of this steel against SSRT. It is concluded that the susceptibility of high strength Fe–18Ni–Co steel to HE can be reduced through crystallographic texture control and grain boundary engineering.
Descrição: MASOUMI, M. et al. Texture and grain boundary study in high strength Fe–18Ni–Co steel related to hydrogen embrittlement. Materials and Design.v. 91, p. 90-97, 2016.
URI: http://www.repositorio.ufc.br/handle/riufc/22459
ISSN: 0264-1275
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