Evolution mechanism of microstructure and microhardness of Ti–6Al–4V alloy during ultrasonic elliptical vibration assisted ultra-precise cutting

• DOI: 10.1016/j.jmrt.2024.03.214
• Publication Date: 2024-03-28T15:37:40Z
• Authors: Rongkai Tan; Shijing Jin; Shuangquan Wei; Jiacheng Wang; Xuesen Zhao; Zhanfeng Wang; Qi Liu; Tao Sun
• Keywords: Titanium alloy; Work hardening; Severe Plastic Deformation

The ultra-precision Ti–6Al–4V alloy parts are growing used in medical and aerospace industries, which always work the extreme working conditions such as high temperature, pressure, variable load. Thus, requirements for machining accuracy surface quality of getting higher higher. ultrasonic elliptical vibration assisted cutting (UEVC) technology has been proved to be an effective method alloy. However, UEVC process, evolution mechanism microstructure microhardness, directly affect service performance life, is unrevealed. In this paper, comprehensive investigations microstructural plastic deformation, grain refinement, phase transformation microhardness machined layer under conventional (CC) processes carried out. experimental results indicated that, due effects technology, deformation area show obvious compression depth less than 10 μm, there no on material, hardening rate more 20%. These findings a unique influence alloy, have important implications parameter design parts.