Environmentally assisted fatigue behavior of 308L weld metal in borated and lithiated high-temperature water

被引：12
|
作者：
Gao, Jun [1 ,2 ]
Zhang, Ziyu [1 ]
Tan, Jibo [1 ]
Wu, Xinqiang [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 Ma, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
来源：
JOURNAL OF NUCLEAR MATERIALS | 2020年 / 539卷
基金：
中国国家自然科学基金;
关键词：
Stainless steel; SEM; Corrosion fatigue; High temperature corrosion; Welding; 316LN STAINLESS-STEEL; STRESS-CORROSION CRACKING; STAGE-I PROPAGATION; HIGH-STRAIN FATIGUE; LOW-CYCLE FATIGUE; LOW-ALLOY; GROWTH BEHAVIOR; DELTA-FERRITE; PREDICTION; MECHANISMS;
D O I：
10.1016/j.jnucmat.2020.152365
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Environmentally assisted fatigue (EAF) tests in borated and lithiated high-temperature water were conducted to investigate the effect of dissolved oxygen (DO), strain rate and strain amplitude on fatigue life of 308L weld metal. It was found that fatigue lives were comparable in 0.005 ppm DO and 0.1 ppm DO water, and decreased slightly with decreasing the strain rate from 0.04%/s to 0.004%/s. The EAF effects were more pronounced at low strain amplitudes. The EAF cracking mechanisms involved with dendrite boundary orientation relative to cyclic stress axis and 8-ferrite in 308L weld metal are discussed. (C) 2020 Published by Elsevier B.V.
引用
收藏
页数：10
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