The correlation between the dislocation slip/grain boundary interaction mode and the resistance to SCC initiation of Alloy 690 in simulated PWR primary water

被引：5
作者：
Kuang, Wenjun [1 ]
Ning, Zehao [1 ]
Yue, Han [1 ]
Hao, Xianchao [2 ]
Li, Jiang [3 ]
机构：
[1] Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale CAMP Nano, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
[3] Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 217卷
基金：
中国国家自然科学基金;
关键词：
Alloy; SEM; Stress corrosion; Effects of strain; Reactor conditions; STRESS-CORROSION CRACKING; HIGH-TEMPERATURE; BEHAVIOR; DENSITY; CHANNEL;
D O I：
10.1016/j.corsci.2023.111096
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Recurring step straining was applied on Alloy 690 to establish a correlation between the dislocation slip/grain boundary (GB) interaction mode and the resistance to stress corrosion crack (SCC) initiation in high temperature hydrogenated water. The intergranular carbides can suppress the dislocation transmission across GB in thermally treated Alloy 690. GBs that block dislocation slip show higher resistance to SCC initiation than those that transmit slip. Such correlation reveals that the local normal strain near GB is the primary driving force for breaching the surface oxide film over GB which is a critical prerequisite in the SCC initiation of Alloy 690.
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页数：7
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