Strain-rate dependent fatigue behavior of T91 steel at 550 °C of liquid lead-bismuth eutectic

被引：0

作者：

Xue, Baoquan ^{[1
,2
]}

Tan, Jibo ^{[1
]}

Wu, Xinqiang ^{[1
]}

Zhang, Ziyu ^{[1
]}

Wang, Xiang ^{[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 / 240卷

基金：

中国国家自然科学基金;

关键词：

Steel; Fatigue; Oxidation; Embrittlement; LOW-CYCLE FATIGUE; FERRITIC-MARTENSITIC STEEL; METAL EMBRITTLEMENT; SUSCEPTIBILITY; ENVIRONMENT;

D O I：

10.1016/j.corsci.2024.112433

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Low cycle fatigue behavior of T91 steel was investigated in oxygen saturated liquid lead-bismuth eutectic (LBE) at 550 degrees C with different strain rates. The fatigue life of T91 steel decreases by about 85 % with decreasing strain rate from 0.4 % to 0.004 %/s. The crack tip was carefully analyzed by advanced characterization. The intergranular oxidation resistance of T91 steel decreases at lower strain rates, leading to fatigue failure mode changes from quasi-cleavage to cleavage cracking. Notably, the cracks (>200 mu m) propagate along the recrystallization grain boundaries with Pb/Bi segregation but without oxides detected at 0.004 %/s.

引用

页数：16

共 38 条

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