Effects of heterogeneous plastic strain on hydrogen-induced cracking of twinning-induced plasticity steel: A quantitative approach

被引：5
|
作者：
Fu, Hao [1 ,2 ]
He, Wenhao [2 ]
Mi, Zhishan [4 ]
Yan, Yu [1 ,2 ]
Zhang, Jianliang [3 ]
Li, Jinxu [1 ,5 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Shunde Innovat Sch, Foshan 528399, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
[4] China Iron & Steel Res Inst Grp, Mat Digital R&D Ctr, Beijing 100081, Peoples R China
[5] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, 30 xueyuan Rd, Beijing 100083, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 209卷
关键词：
Twining-induced plasticity steels; Hydrogen embrittlement; Heterogeneous strain; Geometrically necessary dislocation; Hydrogen-induced crack; SLIP TRANSFER; EMBRITTLEMENT; IRON; ORIENTATION; PROPAGATION; FRACTURE; GRAINS;
D O I：
10.1016/j.corsci.2022.110782
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Heterogeneous plastic strain is essential for understanding hydrogen-induced crack (HIC) initiation in twining -induced plasticity (TWIP) steel with relatively no microtexture. In this study, electron backscattered diffrac-tion technology was used to quantitatively characterize the heterogeneous plastic strain after a slow strain rate test with hydrogen charging, and the deformation mode and HIC initiation mechanism were clarified. From a statistical analysis of more than 100 grain boundaries, the cracked grain boundary and its vicinity have high heterogeneous strain; that is, the geometrically necessary dislocation density is high, and vice versa. Therefore, high strain incompatibility is the key factor for HIC initiation.
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收藏
页数：6
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