Insights into the superior stress corrosion cracking resistance of FeCrAl alloy in high temperature hydrogenated water: The critical role of grain boundary oxidation

被引：18

作者：

Xie, Jiayu ^{[1
]}

Zhang, Shihao ^{[1
]}

Dong, Jiuyang ^{[1
]}

Wang, Shengkai ^{[1
]}

Wang, Hui ^{[2
]}

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

[2] Nucl Power Inst China, Sci & Technol Reactor Fuel & Mat Lab, Chengdu 610213, Sichuan, Peoples R China

来源：

CORROSION SCIENCE | 2022年 / 208卷

基金：

中国国家自然科学基金;

关键词：

Stainless steel; SEM; STEM; Oxidation; High temperature corrosion; Intergranular corrosion; 304L STAINLESS-STEEL; OXIDE-FILM FORMATION; UNIFORM CORROSION; NORMAL OPERATION; BEHAVIOR; PERFORMANCE; MECHANISM;

D O I：

10.1016/j.corsci.2022.110668

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stress corrosion cracking (SCC) initiation behavior of FeCrAl alloy was studied through constant extension rate tensile (CERT) test in high temperature hydrogenated water. Compared with a nuclear-grade austenitic 304 stainless steel (SS), the FeCrAl alloy is much more resistant to SCC initiation. The difference in SCC resistance results from the different oxidation behaviors. 304 SS shows typical preferential intergranular oxidation (PIO) which can degrade the strength of grain boundary. In contrast, FeCrAl is immune to PIO and forms homogeneous nano-grained oxide layer. The original grain boundary vanishes after oxidation, thus is not a weak site for SCC initiation.

引用

页数：8

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