Sub-surface and surface analysis of high speed machined Ti–6Al–4V alloy

To understand the effects of cutting the surface integrity is an important goal to control the quality of a work piece. The current paper summarizes an extensive experimental study of the surface integrity and the sub-surface microstructure during high speed machining in orthogonal cutting condition. This study includes measurements of residual stresses and crystallographic texture in addition to electron microscopy observations. Our observations and conclusions are primarily focused on the effect of cutting speed considering a set of constant machining parameters on the microstructure evolution of the sub-surface of the material. The results allow a better understanding of the cutting process in high speed machining of titanium alloy Ti–6Al–4V.