Effect of roller burnishing on the mechanical behavior and surface quality of Ti6Al4V alloy

Abstract

A low-cost and effective surface treatment technique that has gained popularity recently is roller burnishing. In this procedure, the rolling element is forced against the surface with a specified amount of force, which results in small plastic deformations that reduce surface roughness without removing chips from the surfaces. The method results in a considerable decrease in surface roughness while the material's surface hardness rises. The effects of roller burnishing process parameters (burnishing pressure, number of passes, and feed rate) on Ti6Al4V tensile strength and surface roughness were investigated experimentally in this study. In the study, the burnishing procedure was carried out via a specifically created disc-shaped equipment using the Taguchi L16 experimental design approach. The study's findings showed that the roller burnishing technique improved the Ti6Al4V alloy's surface quality, microhardness and ultimate tensile strength. It was shown that roller burnishing increased the surface roughness, microhardness and ultimate tensile strength by 64%, 16,25%, and 94%, respectively.