Anisotropic micro cutting of rolled titanium alloy

Abstract

In machining of rolled titanium alloy, the anisotropy in the cutting force induced by the rolling texture should be controlled to achieve high quality surface. The cutting tests on the normal direction (ND) plane of a rolled titanium alloy plate are conducted with changing the cutting direction with respect to the rolling direction. The deformation and the cutting force in micro cutting are discussed compared to those in cutting of single crystal titanium. Although the anisotropic effect on the cutting process is smaller than that of the single crystal workpiece, little deformation occurs around the boundary between the groove and the unmachined surface when cutting along the rolling direction. The material behavior is characterized by the shear plane cutting model. The shear angle and the shear stress on the shear plane depend on the cutting direction for the rolling direction.