On the Behavior of Nanohardness Under High-Pressure Torsion in Two-Component Titanium Alloys

Abstract

The behavior of the nanohardness of titanium-based alloys at various torque values during high-pressure torsion is considered. In this case, the linear lattice deformation and the change in dislocation density are taken into account. It is shown that the change in nanohardness along the radius has an oscillating character with a maximum at the center of the sample, and the corresponding curve in the absence of sample slip is symmetrical. The radial distributions of the linear size of the unit cell and the dislocation density are studied. It is shown that the rate of dislocation accumulation has anomalies at certain points of the sample radius.