Mechanical Properties of Submicrocrystalline Ti-6Al-4V Titanium Alloy Produced by Severe Plastic Deformation

Abstract

Mechanical properties of submicrocrystalline (grains size of about 0.4 μm) Ti-6Al-4V alloy produced by means of sequential deformation of a sample along three orthogonal directions (“abc” deformation). Enhancement of the mechanical properties of the alloy in terms of yield strength, ultimate tensile strength and fatigue strength as compared with the heat-strengthened microcrystalline alloy was revealed. Further increase in the strength of the submicrocrystalline alloy due to cold or warm rolling was shown. The causes of mechanical properties enhancing are discussed.