Effects of Surface Treatment on Fretting Fatigue Performance of Ti-6Al- 4V

摘要

The fretting fatigue performance of Ti-6Al-4V after isothermal exposure was explored in test coupons in low plasticity burnished (LPB), shot peened (SP), and electropolished (ELP) baseline conditions. In the current study, fretting fatigue data and fractography are presented along with in-depth residual stress profiles, both before and after the isothermal exposure. Surface roughness data for each of the three surface conditions are reported. For the studied fretting configuration, it was found that both the shot peening and LPB process improved the fretting fatigue performance over the baseline electropolished condition. In the LPD'd case the fretting damage was largely ameliorated by the burnishing process.