Texture Evolution in a Ti-Ta-Nb Alloy Processed by Severe Plastic Deformation

Abstract

Titanium alloys are extensively used in a variety of applications because of their good mechanical properties, high biocompatibility, and corrosion resistance. Recently, β-type Ti alloys containing Ta and Nb have received much attention because they feature not only high specific strength but also biocorrosion resistance, no allergic problems, and biocompatibility. A Ti-25Ta-25Nb β-type titanium alloy was subjected to severe plastic deformation (SPD) processing by accumulative roll bonding and investigated with the aim to observe the texture developed during SPD processing. Texture data expressed by pole figures, inverse pole figures, and orientation distribution functions for the (110), (200), and (211) β-Ti peaks were obtained by XRD investigations. The results showed that it is possible to obtain high-intensity share texture modes ({001}〈110〉) and well-developed α and γ-fibers; the most important fiber is the α-fiber ({001}$\left\langle {1\bar{1}0} \right\rangle$ to {114}$\left\langle {1\bar{1}0} \right\rangle$ to {112}$\left\langle {1\bar{1}0} \right\rangle$). High-intensity texture along certain crystallographic directions represents a way to obtain materials with high anisotropic properties.