Microstructurally and mechanically small fatigue crack growth behaviors of 316LN stainless steel in high-temperature pressurized water

被引：3

作者：

Ma, Yongjian ^{[1
,2
]}

Zhang, Ziyu ^{[1
]}

Tan, Jibo ^{[1
]}

Wu, Xinqiang ^{[1
]}

Wang, Xiang ^{[1
]}

Wang, Yuan ^{[1
]}

Han, En-Hou ^{[1
]}

Ke, Wei ^{[1
]}

机构：

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

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

来源：

CORROSION SCIENCE | 2024年 / 227卷

基金：

中国国家自然科学基金;

关键词：

Stainless steel; SEM; TEM; Corrosion fatigue; High temperature corrosion; CORROSION-FATIGUE;

D O I：

10.1016/j.corsci.2023.111735

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion fatigue behaviors at different stages of microstructurally small crack (MSC) and mechanically small crack (MeSC) for 316LN stainless steel were investigated in high-temperature pressurized water by interrupted tests. An improved model about the proportion in total fatigue life and growth rate for the MSC and MeSC has been proposed. It is found that the proportion in total fatigue life for the MSC is lower and the crack growth rate is higher at a lower strain rate due to the high plastic deformation and dislocation density at grain boundary. Mechanism of crack growth in high-temperature pressurized water is discussed.

引用

页数：10

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