Hydrogen absorption and embrittlement of martensitic medium-Mn steels

被引：6

作者：

Lyu, Ahjeong ^{[1
]}

Lee, Junghoon ^{[1
,2
]}

Nam, Jae-Hoon ^{[1
,3
]}

Kim, Minjeong ^{[1
]}

Lee, Young-Kook ^{[1
,4
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea

[2] Helmholtz Zentrum Hereon, Inst Mat Proc & Design, D-21502 Geesthacht, Germany

[3] Korea Inst Ind Technol, Shape Mfg R&D Dept, 156 Gaetbeol Ro, Incheon 21999, South Korea

[4] Pohang Univ Sci & Technol, Grad Inst Ferrous & Energy Mat Technol, Pohang 37673, South Korea

来源：

CORROSION SCIENCE | 2023年 / 221卷

基金：

新加坡国家研究基金会;

关键词：

Medium-Mn steel; Hydrogen embrittlement; Martensite; Grain boundary segregation; Fracture mechanisms; GRAIN-BOUNDARY SEGREGATION; INDUCED DELAYED CRACKING; DISLOCATION DENSITY; MECHANICAL-PROPERTIES; LATH MARTENSITE; ALLOY-STEEL; AL-SI; MICROSTRUCTURE; BEHAVIOR; FRACTURE;

D O I：

10.1016/j.corsci.2023.111304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present study, the H absorption and the H embrittlement (HE) resistance of medium (3-7 wt%) Mn martensitic steels were investigated. When the specimens were electrochemically H-charged, 7 wt% Mn spec-imen had the highest diffusible H content because of the highest reversible H trap density. When the diffusible H content was identical, HE resistance deterioration arose due to the Mn addition, probably caused by grain boundary decohesion and H segregation into the grain boundaries. However, this condition was improved by B addition due to the enhanced grain boundary cohesion and the suppression of H segregation into the grain boundaries.

引用

页数：15

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