Investigation of Inhibition of Stress Corrosion Cracking of Welded Ti-6Al-4V Alloy using Electrochemical Noise

作者：Yan Liu, Jicai Feng, Shuping Tan, Yi Cheng, Jin Hu · 发表于：International Journal of Electrochemical Science · 年份：2020 · DOI：10.20964/2020.09.102 · 被引用次数：10 · 研究领域：Hydrogen embrittlement and corrosion behaviors in metals、Fatigue and fracture mechanics、Welding Techniques and Residual Stresses

In this study, the effect of residual stress on the stress corrosion cracking behavior of welded Ti-6Al-4V alloy was investigated by means of electrochemical noise. The residual stress is effectively relaxed by local rapid induction heating, and the higher heat treatment temperature leads to lower residual stress. The residual stress has a significant effect on the mechanical properties and sensitivity of stress corrosion cracking under the slow strain rate tensile test, which respectively increases and decreases continuously with the gradual relaxation of residual stress. The results indicate that a sample with lower residual stress shows higher corrosion resistance and later occurrence time of localized corrosion during the slow strain rate tensile test. The relaxation of residual stress significantly inhibits the stress corrosion cracking process.