Effect of Residual Stress Relaxation by Means of Local Rapid Induction Heating on Stress Corrosion Cracking Behavior and Electrochemical Characterization of Welded Ti-6Al-4V Alloy Under Slow Strain Rate Test
- Resource Type
- Article
- Authors
- Yan Liu; Shawei Tang; Guangyi Liu; Yue Sun; Jin Hu
- Source
- Metals and Materials International, 23(3), pp.488-498 May, 2017
- Subject
- 재료공학
- Language
- English
- ISSN
- 2005-4149
1598-9623
In this study, a welded Ti-6Al-4V alloy was treated by means of local rapid induction heating in order torelax the residual stress existed in the weldment. The welded samples were heat treated at the differenttemperatures. The stress corrosion cracking behavior and electrochemical characterization of the as-weldedsamples before and after the post weld heat treatment as a function of residual stress were investigated. Electrochemical impedance spectroscopy measurements of the samples under slow strain rate test wereperformed in a LiCl-methanol solution. The results demonstrated that the residual stress in the as-weldedsample was dramatically reduced after the post weld heat treatment, and the residual stress decreased withthe increase in the heat treatment temperature. The stress corrosion cracking susceptibility and electrochemicalactivity of the as-welded sample were significantly reduced after the heat treatment due to therelaxation of the residual stress, which gradually decreased with the decreasing value of the residual stressdistributed in the heat treated samples.