The structure dependence of oxidation behavior of high-angle grain boundaries of alloy 600 in simulated pressurized water reactor primary water

被引：5
|
作者：
Feng, Xingyu [1 ]
Wang, Qi [1 ]
Xie, Jiayu [1 ]
Kuang, Wenjun [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 | 2023年 / 218卷
基金：
中国国家自然科学基金;
关键词：
Alloy; 600; STEM; Grain boundary diffusion; Grain boundary migration; Intergranular oxidation; STRESS-CORROSION CRACKING; PREFERENTIAL INTERGRANULAR OXIDATION; QUANTITATIVE ASSESSMENT; SECONDARY-SIDE; INTERNAL OXIDATION; STAINLESS-STEEL; MIGRATION; NICKEL; STEAM; NI;
D O I：
10.1016/j.corsci.2023.111162
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The intergranular degradation of seven different types of high-angle grain boundaries (HAGBs) were investigated on Alloy 600 after exposure to simulated pressurized water reactor primary water. All boundaries are susceptible to preferential intergranular oxidation (PIO) except for ideal coherent twin boundary. Diffusion induced grain boundary migration (DIGM) normally occurs and its depth is positively correlated with the PIO extent. Interestingly, the PIO susceptibility is independent on the grain boundary misorientation angle or & sigma; value, but related to the grain boundary atom packing density (GBAPD). Grain boundaries with higher GBAPD values show higher PIO resistance as the element diffusion is slower.
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页数：13
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