Hydrogen embrittlement behavior of Inconel 718 alloy at room temperature

被引：26
|
作者：
Li, Xinfeng [1 ]
Zhang, Jin [2 ]
Akiyama, Eiji [3 ]
Fu, Qinqin [4 ]
Li, Qizhen [1 ]
机构：
[1] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA
[2] SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA
[3] Tohoku Univ, Inst Mat Res, Mat Design Div, Sendai, Miyagi 9808577, Japan
[4] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Sch Mat Sci & Engn, Xian 710049, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2019年 / 35卷 / 04期
关键词：
Embrittlement; Hydrogen in metals; Inconel; 718; alloy; Portevin-Le Chatelier effect; MECHANICAL-PROPERTIES; STRAIN; FRACTURE; DEFORMATION; MICROSTRUCTURE; PRECIPITATION; CRACKING; STRESS;
D O I：
10.1016/j.jmst.2018.10.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hydrogen embrittlement of Inconel 718 alloy was investigated. Multi-scale observation technique were employed, comprising slow strain rate tensile tests, scanning electron microscopy and transmission electron microscopy analysis. The results demonstrate that hydrogen charging deteriorates mechanical properties of the alloy. Inconel 718 alloy shows partial Portevin-Le Chatelier (PLC) effect at room temperature when hydrogen charging current density is 220 mA cm(-2) and 590 mA cm(-2). Moreover, plastic deformation features with dislocation cells are detected in hydrogen-induced brittle zone. Thus, it is concluded that dragging effect of hydrogen atoms on dislocations contributes to PLC effect. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：499 / 502
页数：4
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