Effects of welding columnar grain orientation and strain rate on corrosion fatigue behavior of Alloy 52/52M weld metal in high-temperature water

被引：10

作者：

Gao, Jun ^{[1
,2
]}

Tan, Jibo ^{[1
]}

Zhang, Ziyu ^{[1
]}

Jiao, Ming ^{[3
]}

Wu, Xinqiang ^{[1
]}

Tang, Lichen ^{[3
]}

Huang, Yifeng ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China

[3] Shanghai Nucl Engn Res & Design Inst, Shanghai 200233, Peoples R China

来源：

CORROSION SCIENCE | 2021年 / 180卷

基金：

中国国家自然科学基金;

关键词：

Corrosion fatigue; Superalloys; High temperature corrosion; Welding; DUCTILITY-DIP CRACKING; LOW-CYCLE FATIGUE; ENVIRONMENTALLY ASSISTED CRACKING; 316LN STAINLESS-STEEL; MICROSTRUCTURE; MECHANISMS; INITIATION; STEAM; PROPAGATION; INCLUSION;

D O I：

10.1016/j.corsci.2020.109196

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion fatigue (CF) tests of Alloy 52/52 M weld metal from a safe-end welding joint of reactor pressure vessel were performed in B/Li high-temperature water. The CF cracks developed preferentially in 52 Mw with columnar grain orientation at a 45 degrees - 75 degrees angle to cyclic loading axis, rather than in 52b with columnar grain orientation parallel to loading axis. The environmental assisted fatigue effects were significant under lower strain amplitudes and the effect of strain rate on CF behavior was not significant. The CF cracking mechanism involved with welding columnar grain orientation is discussed.

引用

页数：13

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