Strain rate dependence of the effect of intergranular carbides on the resistance to stress corrosion cracking initiation of alloy 690 in simulated PWR primary water

被引：12

作者：

Kuang, Wenjun ^{[1
]}

Wang, Shengkai ^{[1
]}

Feng, Xingyu ^{[1
]}

Yue, Han ^{[1
]}

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

来源：

CORROSION SCIENCE | 2022年 / 206卷

基金：

中国国家自然科学基金;

关键词：

Alloy; STEM; Oxidation; Intergranular corrosion; Stress corrosion; GRAIN-BOUNDARY STRUCTURE; HIGH-TEMPERATURE; DEGRADATION; DISLOCATION; BEHAVIOR;

D O I：

10.1016/j.corsci.2022.110502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stress corrosion cracking (SCC) initiation of alloy 690 in simulated PWR primary water was evaluated in constant extension rate tensile tests with different strain rates. The SCC initiation was inhibited by intergranular carbide precipitation. However, the carbide effect weakened with increasing strain rate. The SCC mitigation effect of carbides mainly arises from the carbides' ability to impede the transfer of dislocations across grain boundaries and delay the local break-down of surface oxide films. However, dislocations accumulated near the grain boundary can promote intergranular oxidation which induces cracking after the oxide film fails.

引用

页数：11

共 32 条

[1]

Andresen P.L., 2009, P 14 INT C ENV DEGR

[2]

Andresen P.L., 2013, P 16 INT C ENV DEGR

[3] Dependence of Stress Corrosion Cracking of Alloy 690 on Temperature, Cold Work, and Carbide Precipitation-Role of Diffusion of Vacancies at Crack Tips [J].