A novel surface grain boundary engineering approach to improving corrosion resistance of a high-N and Ni-free austenitic stainless steel

被引：4

作者：

Jia, Zi-Peng ^{[1
,2
]}

Guan, Xian-Jun ^{[1
,2
]}

Wang, Dong-Qi-Qiong ^{[1
,2
]}

Shi, Feng ^{[1
,2
]}

Li, Xiao-Wu ^{[1
,2
]}

机构：

[1] Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Minist Educ, Shenyang 110819, Peoples R China

[2] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China

来源：

CORROSION SCIENCE | 2024年 / 233卷

基金：

中国国家自然科学基金;

关键词：

High-N and Ni-free austenitic stainless steel; Surface spinning strengthening; Annealing; Surface grain boundary engineering; Intergranular corrosion; Stress corrosion cracking; 50CRMNMOVNB SPRING STEEL; CENTERED-CUBIC METALS; HIGH-NITROGEN; NICKEL-FREE; CHARACTER-DISTRIBUTION; CRACKING SUSCEPTIBILITY; ALLOY; 600; PRECIPITATION; BEHAVIOR; EVOLUTION;

D O I：

10.1016/j.corsci.2024.112110

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Grain boundary engineering (GBE) can effectively improve the corrosion resistance of materials, but the traditional thermal-mechanical process still exhibits some limitations. In the present work, a novel surface spinning strengthening (3 S) technology followed by heat treatment was applied to modify the microstructure near the surface (similar to 400 mu m) of a high-N Ni-free austenitic stainless steel. Under an optimal condition of annealing at 1323 K for 60 min after 3 S, the fraction of special boundaries mainly involving Sigma 3 boundaries in GBE layer was significantly improved from 48.3 % to 69.1 %, thus achieving excellent resistances to intergranular corrosion and stress corrosion cracking.

引用

页数：12