Using the Capabilities of the Combined Ultrasonic Treatment to Achieve the Desired Quality Parameters of the Surface Layer of the Parts Made of Titanium Alloys

Abstract

The results of studying the phase composition and residual stresses in the surface layer of the workpieces made of alpha-beta titanium alloy after their combined treatment by turning and ultrasonic hardmetal burnishing are presented. Control of the quality parameters is performed using modern equipment and nondestructive procedures. Data has shown that change in the elements of combined treatment significantly affect the value of the residual stress and ratio of α-/β-titanium in the surface layer, whereas the processing itself appeared to be an effective tool for attaining the desired parameters of the quality. The rate of the workpiece rotation has an opposite effect on the residual stresses and phase composition of the surface layer of the examined samples that can be attributed to the formation of TiFe and TiFe₂ intermetallic phases.