The intergranular oxidation behavior of low-angle grain boundary of alloy 600 in simulated pressurized water reactor primary water

被引：34
作者：
Feng, Xingyu [1 ]
Xie, Jiayu [1 ]
Huang, Mingzheng [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：
ACTA MATERIALIA | 2022年 / 224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; QUANTITATIVE ASSESSMENT; SECONDARY-SIDE; HIGH-TEMPERATURE; MIGRATION; DIFFUSION; CHARACTER; STEAM; SUBMODES; ORIENTATION;
D O I：
10.1016/j.actamat.2021.117533
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The preferential intergranular oxidation (PIO) behavior of low-angle grain boundaries (LAGBs) with misorientation angle 0 ranging from 5.7 to 14.0 degrees on alloy 600 were investigated after exposure to simulated pressurized water reactor primary water. Interestingly, all LAGBs are susceptible to PIO. When 0 < 8.8 degrees, diffusion-induced grain boundary migration (DIGM) does not occur as Cr is immobile and the PIO depth varies slightly among those LAGBs. As 0 increases above 8.8 degrees, Cr starts to diffuse outwards and DIGM occurs. The depths of PIO and DIGM are positively correlated in this case. Also, the PIO depth is not related to the change of 0, but instead poses an inverse relationship with the atom packing density of GB planes. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页数：12
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