文献类型：期刊文献

英文题名：Improving corrosion resistance associated with martensite in austenitic stainless steel by modulating variant selection

作者：Wang, Jinliang[1];Liu, Xing[1];Xi, Xiaohui[1];Xu, Ning[2];Lin, Jianchun[3];Qin, Zhenbo[4];Hu, Jiezhen[1]

机构：[1]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China;[2]East China Jiaotong Univ, Sch Mat Sci & Engn, Nanchang 330013, Peoples R China;[3]Guangdong Ocean Univ, Sch Mat Sci & Engn, Yangjiang 529500, Peoples R China;[4]Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China

年份：2026

卷号：265

外文期刊名：CORROSION SCIENCE

收录：SCI-EXPANDED(收录号：WOS:001728555700001)、、EI(收录号：20261220330199)、WOS

基金：This work is supported by the National Natural Science Foundation of China (Grant No: 52401141, 52101133 and 52474332) , Guangdong Basic and Applied Basic Research Foundation (Grant No: 2024A1515010726) .

语种：英文

外文关键词：Austenitic stainless steel (ASS); Martensite; Variant selection; Sigma 3 grain boundary; Passive film; Corrosion resistance

外文摘要：The single-variant and multi-variant martensite were introduced in 321 type stainless steel, and the corresponding corrosion resistance was comparatively investigated. A relatively higher corrosion resistance was achieved in the steel with single-variant martensite, which was mainly associated with a higher fraction of Sigma 3 grain boundaries and more (111) crystal planes obtained by tailoring variant selection. Sigma 3 boundaries decreased the defect density and promoted the formation of denser and more continuous CraOs layers, thus reducing the cation vacancy concentration and blocking Cl- diffusion. Sigma 3 grain boundaries promoted the carrier distribution homogenization, eliminating the grain boundary-grain galvanic effect and shifting the corrosion potential positively. (111) planes favored CraOs nucleation and reduced the formation of non-protective FeaOs/FesO4 compounds, thus promoting the formation of continuous CraOs film, reducing cation vacancy concentration and increasing passive film resistivity and semiconductor stability. Accordingly, a higher resistance to pitting corrosion and uniform corrosion was achieved in R1 sample. This study presented a new strategy for improving the corrosion resistance of austenitic stainless steel with martensite.