Anisotropy in Elastic Properties of Textured TiNbAl Shape Memory Alloy

摘要

Anisotropy in elastic properties of Ti-24 mol percent Nb-3 mol percent 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>_beta{112}_beta-type recrystallization texture is formed by an annealing at 1273K for 1.8ks after a severe cold-rolling. Young's modulus of the beta-phase exhibited a strong anisotropy depending on the loading direction. Young's modulus along of beta-phase of TiNbAl around room temperature was estimated to be E = (1/25 - 2 centre dot 0.04 centre dot GAMMA )~(-1) GPa, with assuming that the texture is perfectly developed.