文献类型：期刊文献

英文题名：Superior hydrogen embrittlement resistance associated with martensite in austenitic stainless steel achieved by modulating variant selection

作者：Xi, Xiaohui[1];Wu, Tong[1];Liu, Zhikun[1];Zheng, Yongchang[1];Wang, Jinliang[1];Xu, Ning[2];Zhang, Zhen[3];Liu, Qiang[1]

机构：[1]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China;[2]East China Jiaotong Univ, Sch Mat Sci & Engn, Nanchang 330013, Peoples R China;[3]Hebei Univ Technol, Ctr Adv Laser Technol, Tianjin 300130, Peoples R China

年份：2026

卷号：26

期号：3

外文期刊名：ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001727781200001)、、EI(收录号：20261420404082)、WOS

基金：This work is supported by the National Natural Science Foundation of China (Grant No: 52401141), Guangdong Basic and Applied Basic Research Foundation (Grant No: 2024A1515010726 and 2021A1515110581).

语种：英文

外文关键词：Austenitic stainless steel; Martensite; Hydrogen embrittlement; Variant selection; Grain boundary; Crystallography

外文摘要：This work examined the effect of variant selection on hydrogen embrittlement (HE) in austenitic stainless steel associated with martensite. The single-variant martensite and multi-variant martensite were introduced into the austenitic stainless steel, and the corresponding HE behavior was comparatively investigated. The introduction of multi-variant martensite led to a higher proportion of Sigma 3 grain boundary, while introduction of single-variant martensite was accompanied by a higher MUD of < 111 > oriented grains. Sigma 3 grain boundary can trap more hydrogen steadily as irreversible hydrogen traps and impede the free migration of hydrogen as three-dimensional diffusion barriers, thereby suppressing the brittle intergranular fracture by disrupting the connectivity of RGBs. A higher MUD of < 111 > oriented grains promoted the diffusion of hydrogen in the steel with single-variant martensite, accordingly increasing the susceptibility to hydrogen embrittlement. Under the combined effect of two factors, a considerably higher HE resistance was achieved in the steel with multi-variant martensite. This work provided a new insight into the effect of variant selection on HE and offered a novel approach for martensite design to alleviate HE in austenitic stainless steel with martensite.