原子能科学技术2017，Vol.51Issue(4)：721-726,6.DOI:10.7538/yzk.2017.51.04.0721
焊接残余应力对316LN不锈钢应力腐蚀裂纹扩展速率的影响
Effect of Welding Residual Stress on Stress Corrosion Crack Growth Rate of 316LN Stainless Steel
摘要
Abstract
High residual stress introduced at the welding joint can affect the stress corrosion cracking (SCC) property remarkably.The SCC growth rates of specimens prepared from a 316LN stainless steel AP1000 primary pipe welding mockup were measured in high temperature and high pressure water.The results obtained from heat affected zone (HAZ) of the specimens show that the welding residual stress has significant effects on accelerating crack growth rate,and the stress-relieved specimen has lower crack growth rate than the after-welding specimen.The acceleration of crack growth rate by residual stress seems to be greater in normal hydrogenated PWR water chemistry.关键词
316LN不锈钢/残余应力/应力腐蚀/裂纹扩展速率Key words
316LN stainless steel/residual stress/stress corrosion/crack growth rate分类
能源科技引用本文复制引用
杜东海,赖平,陈凯,张乐福..焊接残余应力对316LN不锈钢应力腐蚀裂纹扩展速率的影响[J].原子能科学技术,2017,51(4):721-726,6.基金项目
大型先进压水堆核电站国家科技重大专项资助项目(2011ZX06004-009-0601) （2011ZX06004-009-0601）
