Influence of cold deformation on the structure, texture, elastic and microdurometric properties of biocompatible beta-titanium alloys based on the Ti–Nb–Zr system

Abstract

The influence of cold rolling with degrees of 85, 90% on the structural and textural state, microdurometric and elastic properties of hardened biocompatible -titanium alloys (at.%) Ti-26%Nb-3%Zr, Ti -26%Nb-5%Zr, Ti-26%Nb-6%Zr, Ti-26%Nb-3%Zr-1%Sn, Ti-26%Nb-3%Zr-1%Sn-0.7Ta . It is shown that an increase in the degree of deformation during cold rolling contributes to the formation of a more pronounced two-component texture {001}, {112} an increase in microhardness and a decrease in the values ​​of the elastic modulus in the rolling plane . A good agreement between the calculated and experimental values ​​of the modulus of elasticity of alloys in the quenched and cold-rolled states has been established.The influence of alloying and anisotropic state of alloys (through the molybdenum equivalent and the Zener anisotropy factor, respectively) on the level of their microhardness, contact modulus of elasticity E, including the difference in E in different sections of a cold-rolled sheet, is considered. It has been established that the minimum average value of Е=51±2 GPa in the rolling plane is given by the Ti-26Nb-3Zr alloy rolled with ε=90%, and the minimum level of average values Е (52±2 GPa in the rolling plane and 62±1 GPa in cross section) is typical for the Ti-26Nb-3Zr-1Sn alloy after rolling with ε= 85%