Insights into dissolved oxygen dependent crack initiation mechanism of 316LN stainless steel fatigue tested in high-temperature pressurized water

被引：0

作者：

Qiao, Yufei ^{[1
,2
]}

Li, Hui ^{[3
]}

Tan, Jibo ^{[1
]}

Liu, Daoping ^{[3
]}

Zhang, Ziyu ^{[1
]}

Wu, Xinqiang ^{[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

[3] Nucl Power Inst China, Sci & Technol Reactor Syst Design Technol Lab, Chengdu 610041, Peoples R China

来源：

CORROSION SCIENCE | 2025年 / 244卷

基金：

中国国家自然科学基金;

关键词：

Stainless steel; Dissolved oxygen; Corrosion fatigue; TEM; High temperature corrosion; LOW-CYCLE FATIGUE; ENVIRONMENTALLY ASSISTED CRACKING; CORROSION-FATIGUE; ALLOY; 690; GROWTH-BEHAVIOR; CHEMISTRY; CARBON;

D O I：

10.1016/j.corsci.2024.112662

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion fatigue behavior of 316LN SS hollow specimen was investigated in high-temperature pressurized water at different dissolved oxygen (DO) concentrations (<5-200 ppb). The fatigue life of 316LN SS significantly increased with increasing DO concentration from < 5-20 ppb, while the effect of DO on fatigue lives apparently saturated at above 20 ppb (20-200 ppb). DO plays a significant role in microstructurally small cracks rather than mechanically small cracks. The oxidation characteristic of slip bands affects the crack initiation process. The effect of DO on the fatigue crack initiation mechanism is discussed.

引用

页数：19

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