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
收藏
页数：12
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