南京工业大学学报（自然科学版）2017，Vol.39Issue(3)：1-5,5.DOI:10.3969/j.issn.1671-7627.2017.03.001
激光冲击处理不锈钢慢应变速率拉伸应力腐蚀性能
Stress corrosion cracking of laser shock processed stainless steel by slow strain rate test
摘要
Abstract
The 304 stainless steel was processed by laser shock processing (LSP).The stress corrosion cracking (SCC) behavior of 304 stainless steel specimen before and after LSP was evaluated using slow strain rate test (SSRT)in 3.5% NaCl solution at 80 ℃.Surface microstructure modification was evaluated by optical microscopy (OM) and scanning electron microscopy (SEM).Micro-hardness distribution in depth and affected depth were investigated by the micro-hardness tester.Results showed that surface refined grains were not found after LSP.However, micro-hardness was increased by LSP.With the increase of shot number, micro-hardness and thickness of affected layer were increased.SSRT results showed that SCC sensitivities of 304 stainless steel were decreased by LSP.SCC sensitivities of two-side LSP with higher resistance were lower than those of one-side one.关键词
激光冲击处理/显微组织/显微硬度/慢应变速率拉伸(SSRT)/应力腐蚀(SCC)Key words
laser shock processing/microstructure/micro-hardness/slow strain rate test(SSRT)/stress corrosion cracking(SCC)分类
矿业与冶金引用本文复制引用
魏新龙,凌祥,张萌..激光冲击处理不锈钢慢应变速率拉伸应力腐蚀性能[J].南京工业大学学报（自然科学版）,2017,39(3):1-5,5.基金项目
国家自然科学基金(50875121) （50875121）
江苏省普通高校研究生科研创新计划(KYZZ_0221) （KYZZ_0221）
