Effects of strain rate on the tensile and creep-fatigue properties of 316H stainless steel

被引：13

作者：

Pan, Zhouxin ^{[1
]}

Li, Yuebing ^{[1
]}

Song, Yuxuan ^{[1
]}

Shen, Rui ^{[2
]}

Xie, Yongcheng ^{[2
]}

Jin, Weiya ^{[1
]}

Zhang, Kai ^{[2
]}

Gao, Zengliang ^{[1
,3
]}

机构：

[1] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310032, Peoples R China

[2] Shanghai Nucl Engn Res & Design Inst Co Ltd, Shanghai 200233, Peoples R China

[3] Minist Educ, Engn Res Ctr Proc Equipment & Remfg, Hangzhou 310032, Peoples R China

来源：

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2022年 / 200卷

基金：

中国国家自然科学基金;

关键词：

316H stainless Steel; Creep; -fatigue; Tensile strength; Strain rate; Dynamic strain aging; RESIDUAL-STRESS STABILITY; CYCLE FATIGUE; LIFE PREDICTION; TEMPERATURE DESIGN; BEHAVIOR; ENERGY; DEFORMATION; MECHANISM; ALLOYS;

D O I：

10.1016/j.ijpvp.2022.104774

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Since the unstable start-ups and shutdown processes of nuclear power plants, the effect of strain rate on tensile and creep-fatigue (CF) properties has attracted attention. This paper aims to study the strain rate dependent tensile and CF behavior of 316H stainless steel. The tensile and CF tests were independently performed with different strain rates of 0.0001, 0.0002, 0.0005, 0.001 and 0.005 s-1 at 600 degrees C. Due to the dynamic strain aging (DSA), the tensile stress-strain curve appears serrated flow phenomenon and shows negative strain rate sensitivity (SRS), which means the tensile strength of the material does not increase significantly with an increase of the strain rate, and even decreases. Meanwhile, it was found that peak tensile stress and inelastic strain increase in CF tests under low strain rates. The CF life of 316H steel was predicted using the hysteresis energy method. At the same time, based on microstructure and fracture observation, different dominant damage mechanisms were discussed.

引用

页数：13

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