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
收藏
页数：15
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