Plastic deformation sequence and strain gradient characteristics of hydrogen-induced delayed crack propagation in single-crystalline Fe-Si alloy

被引：8

作者：

Huynh, Thanh Thuong ^{[1
]}

Koyama, Motomichi ^{[2
]}

Takahashi, Yoshimasa ^{[3
]}

Hamada, Shigeru ^{[4
]}

Tsuzaki, Kaneaki ^{[4
]}

Noguchi, Hiroshi ^{[4
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[2] Tohoku Univ, Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[3] Kansai Univ, Dept Mech Engn, 3-3-35 Yamate Cho, Suita, Osaka 5648680, Japan

[4] Kyushu Univ, Dept Mech Engn, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

来源：

SCRIPTA MATERIALIA | 2020年 / 178卷

关键词：

Hydrogen; Delayed fracture; Crack propagation; Steel; DISLOCATION EMISSION; STAINLESS-STEEL; EMBRITTLEMENT; DIFFUSION; STRESS; GROWTH; TIP;

D O I：

10.1016/j.scriptamat.2019.11.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microscopic features of hydrogen-induced delayed crack propagation in a thin sheet of single-crystalline Fe-3wt%Si alloy were investigated. The crack tip plastic deformation associated with the effect of hydrogen during the crack propagation leaves three adjacent regions where different plastic strain gradients and dislocation densities are observed. These regions revealed the effects of plastic deformation and hydrogen-dislocations interaction around the crack tip on the rate-limiting process of hydrogen-induced delayed crack propagation in thin specimens. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：99 / 103

页数：5

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