Grain boundary engineering of 304 austenitic stainless steel by laser surface melting and annealing

被引：42
|
作者：
Yang, Sen [1 ]
Wang, Zhan Jie
Kokawa, Hiroyuki
Sato, Yutaka S.
机构：
[1] Inner Mongolia Univ Technol, Dept Mat Sci & Engn, Hohhot 010051, Peoples R China
[2] Tohoku Univ, Dept Mat Proc, Grad Sch Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
JOURNAL OF MATERIALS SCIENCE | 2007年 / 42卷 / 03期
基金：
日本学术振兴会; 国家教育部科学基金资助;
关键词：
D O I：
10.1007/s10853-006-0063-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to improve the intergranular corrosion resistance of 304 stainless steel, laser surface remelting experiments were conducted using a 2 kW continuous wave Nd: YAG laser. The grain boundary character distribution (GBCD) and microstructures of the materials were analyzed using EBSD, SEM and OM. The experimental results showed that combination of laser surface melting and annealing on 304 stainless steel resulted in a high frequency of twin boundaries and consequent discontinuity of random boundary network in the materials, which led to an improvement of resistance to intergranular corrosion. The maximum CSL density could reach 88.6% under optimal processing conditions: 1220 K and 28 h.
引用
收藏
页码：847 / 853
页数：7
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