Effects of dissolved hydrogen on corrosion fatigue crack growth behavior of 316LN stainless steel in high temperature pressurized water environment

被引：6
|
作者：
Zhao, Y. G. [1 ]
Lu, Y. H. [1 ]
Zhang, X. F. [1 ]
Li, Z. H. [1 ]
Liu, T. G. [1 ]
Shoji, T. [1 ]
机构：
[1] Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 232卷
关键词：
316LN stainless steel; Corrosion fatigue crack growth; Dissolved hydrogen; Threshold stress intensity range; Slip-dissolution; Mechanical fatigue; STRAIN; INITIATION; STRESS; LIFE; WELD;
D O I：
10.1016/j.corsci.2024.112041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of dissolved hydrogen (DH) on the corrosion fatigue crack growth (CFCG) behavior of 316LN stainless steel (SS) was investigated in high temperature pressurized water. The results indicated that DH slightly increased the CFCG threshold stress intensity range ( Delta K th ) value by 9 % and significantly increased the corrosion fatigue crack growth rate (CFCGR) value by 35 %. On the one hand, DH promoted a large plastic zone formed ahead of the crack tip. On the other hand, DH addition transformed the crack growth mechanism from mainly the slip -dissolution without DH addition to the competition between the slip -dissolution and mechanical fatigue.
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页数：11
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