Study on Room-temperature Elastic Deformation Behavior of Ti-11Mo-6Zr-4.5Sn-3Nb Alloy Sheet for Surgical Implant Applications

The room-temperature elastic deformation behavior for a novel meta-stable β-type Ti-11Mo-6Zr-4.5Sn-3Nb alloy sheet for surgical implant applications was discussed in present investigation. The results show that the engineering stress-engineering strain curves of solution treated alloy sheet present a noticeable “double yielding” phenomenon during the tensile loading-unloading testing at room temperature. Based on the influence of stress-induced α" martensite phase transition,the obtained curves displays the features of approximate non-linear elastic deformation before the appearance of the first yielding point. The initial elastic modulus values determined by the tensile test are not associated with the amount of aged α precipitated phases after the sheet subjected to aging treatment. On the contrary, the values gradually increase with the decrease of the size of β grain as well as α precipitated phase.