Pseudoelastic Properties of Cold-Rolled TiNbAI Alloy

摘要

Microstructures and pseudo-elasticity of as-rolled Ti-24mol%Nb-3mol%Al, a newly developed functional biomedical β-Ti alloy (bcc), at room temperature were characterized. The material was homogenized at 1273K after arc-melting and quenched into water to obtain single phase of β. Cold-rolling of 99% reduction in thickness was carried out and then, microstructures and pseudo-elastic properties were examined. θ-2θXRD measurement revealed that the as-rolled material was consisted with the parent β phase and martensite phase (α", C-center orthorhombic). X-ray pole figure measurements revealed that the rolling texture was a mixture of <110>_β{001 }_β-type and <112>_β{111}_β-type textures. Shape recovery strain of 4% appeared along TD without any intermediate annealing after the cold-rolling.