Anisotropy in Elastic Properties of Textured TiNbAl Shape Memory Alloy

摘要

Anisotropy in elastic properties of Ti-24mol%Nb-3mol%Al (TiNbAl), a new biomedical shape memory alloy developed by our group, was characterized in a temperature range from 133K to 413K. A well developed < 110 >_β{112}_β-type recrystallization texture is formed by an annealing at 1273K for 1.8ks after a severe cold-rolling. Young''s modulus of the β-phase exhibited a strong anisotropy depending on the loading direction. Young''s modulus along < hkl > of β-phase of TiNbAl around room temperature was estimated to be E_( < hkl >) = (1 /25 - 2 • 0.04 • Γ_( < hkl >))~(-1) GPa, with assuming that the texture is perfectly developed.