华中科技大学学报（自然科学版）2024，Vol.52Issue(12)：21-26,6.DOI:10.13245/j.hust.241202
切削加工对高温水环境下304L不锈钢应力腐蚀裂纹萌生的影响
Influence of surface machining on stress corrosion cracking initiation of 304L stainless steel in high temperature water environment
摘要
Abstract
To assess the relationship between the variations of surface integrity induced by cutting process and the stress corrosion cracking susceptibility,slow strain rate test were performed to investigate the stress corrosion cracking behaviors of machined surfaces of 304L austenitic stainless steel in a simulated high temperature water environment,and the relationship between the surface integrity in terms of residual stress and surface defects and the fracture characteristics was analyzed.A model describing the correlation between the apparent stress intensity factor and stress corrosion cracking initiation of machined surface was presented for evaluating the synergistic influence of surface machining-induced defects and residual stress on stress corrosion cracking initiation of 304L austenitic stainless steel under high temperature water environment.Results show that the apparent stress intensity factor has a strong correlation with the time to rupture of specimens.When the stress intensity factor is greater than 0.7 MPa·m0.5,the susceptibility of machined surfaces to stress corrosion cracking increases significantly.关键词
应力腐蚀/奥氏体不锈钢/表面完整性/加工表面/慢应变率试验Key words
stress corrosion cracking/austenitic stainless steel/surface integrity/machined surface/slow strain rate testing分类
通用工业技术引用本文复制引用
王学林,巴思博..切削加工对高温水环境下304L不锈钢应力腐蚀裂纹萌生的影响[J].华中科技大学学报（自然科学版）,2024,52(12):21-26,6.基金项目
国家自然科学基金资助项目(51875219,51375182). （51875219,51375182）
