Cyclic deformation behavior and life prediction of P92 steel welded joints under thermomechanical fatigue loadings

被引：20
作者：
Guo, Shen [1 ,2 ]
Zhang, Wei [1 ,2 ]
Yin, Peng [1 ,2 ]
Ma, Tian-Hao [1 ,2 ]
Wen, Jian-Bin [1 ,2 ]
Zhang, Guo-Dong [3 ]
Xue, Fei [3 ]
Zhao, Yan-Fen [3 ]
Zhou, Chang-Yu [1 ,2 ]
机构：
[1] Nanjing Tech Univ, Sch Mech & Power Engn, Nanjing 211816, Peoples R China
[2] Jiangsu Key Lab Design & Mfg Extreme Pressure Equ, Nanjing 211816, Peoples R China
[3] Suzhou Nucl Power Res Inst, Suzhou 215004, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 147卷
基金：
中国国家自然科学基金;
关键词：
Thermomechanical fatigue; Welded joint; Strain amplitude; Phase angle; Life prediction; GRADE; 91; STEEL; TEMPERED MARTENSITIC STEEL; REMAINING CREEP-PROPERTIES; STAINLESS-STEEL; MICROSTRUCTURE EVOLUTION; FRACTURE-BEHAVIOR; TEMPERATURE; DAMAGE; MECHANISMS; 316L;
D O I：
10.1016/j.ijfatigue.2021.106183
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In the present work, thermomechanical fatigue behavior and life prediction of P92 steel welded joints under various mechanical strain amplitudes and phase angles are investigated. Results demonstrate that the welded joints exhibit significant cyclic softening during fatigue process and the thermomechanical fatigue life is strain amplitude and phase angle dependent. The decrease in strain amplitude and the increase in phase angle induce the increase in fatigue life. Fracture analysis indicates that the fracture position changes significantly with the strain amplitude and phase angle. Finally, a modified energy-based life prediction model is proposed by considering the effects of phase angle and mean stress.
引用
收藏
页数：15
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