Effect of thermal aging on the environmental assisted cracking behavior of 308L weld metal in high temperature water

被引：16
|
作者：
Wang, Jiamei [1 ]
Wu, Yule [1 ]
Zhu, Tianyu [1 ]
Chen, Kai [1 ]
Mei, Jinna [2 ]
Xue, Fei [2 ]
Sun, Haitao [3 ]
Ma, Wujiang [4 ]
Wang, Yuanhua [4 ]
Andresen, Peter L. [1 ]
Zhang, Lefu [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China
[2] Suzhou Nucl Power Res Inst, Suzhou 215004, Peoples R China
[3] Nucl & Radiat Safety Ctr, Beijing 100082, Peoples R China
[4] Shanghai Xinmin Dong Tai Heavy Forging Co Ltd, Suzhou 224200, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 211卷
关键词：
308 L weld metal; Thermal aging; -ferrite; Environmental assisted cracking; Inter-dendritic crack; STRESS-CORROSION CRACKING; DUPLEX STAINLESS-STEEL; PWR PRIMARY WATER; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; GROWTH BEHAVIOR; DELTA-FERRITE; PITTING CORROSION; LIFE PREDICTION; OXIDE-FILM;
D O I：
10.1016/j.corsci.2022.110902
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of thermal aging on environmental assisted cracking (EAC) of 308 L weld metal was investigated. Experimental results reveal that thermal aging promotes corrosion fatigue (CF) crack growth with extensive inter-dendritic cracking, but has a limited effect on the stress corrosion cracking (SCC) growth under constant loads. The higher crack tip strain rate and the enhanced preferential oxidation of deteriorated 6 -ferrite are responsible for the enhanced CF susceptibility after thermal aging. The dispersed 6-ferrites and the decreased crack tip strain rate account for the high SCC resistance under constant load regardless of the thermal aging.
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页数：23
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