High-concentration carbon assists plasticity-driven hydrogen embrittlement in a Fe-high Mn steel with a relatively high stacking fault energy
作者： Ibrahim Burkay Tuğluca , Motomichi Koyama , Burak Bal , Demircan Canadinc , Eiji Akiyama
DOI: 10.1016/J.MSEA.2018.01.087
关键词: Composite material 、 Hydrogen 、 Plasticity 、 Austenite 、 Hydrogen embrittlement 、 Materials science 、 Intergranular corrosion 、 Stacking-fault energy 、 Deformation (engineering) 、 Dynamic strain aging
摘要: Abstract We investigated the effects of electrochemical hydrogen charging on mechanical properties a Fe-33Mn-1.1C austenitic steel with high carbon concentration and relatively stacking fault energy. Hydrogen pre-charging increased yield strength degraded elongation work-hardening capability. The increase in is result solution hardening hydrogen. A reduction cross-sectional area by subcrack formation primary factor causing ability. Fracture modes were detected to be both intergranular transgranular regionally. Neither nor cracking are related deformation twinning or simple decohesion contrast conventional Fe-Mn-C twinning-induced plasticity steels. hydrogen-assisted crack initiation subsequent propagation attributed plasticity-dominated mechanisms associated strain localization. occurrence dynamic aging content ease cross slip owing energy can cause strain/damage localization, which assists embrittlement hydrogen-enhanced localized mechanism.
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