Low Young's Modulus β-Ti Alloys for Biomedical Applications

Abstract

The low Young's modulus of Ti-alloys is of particular importance for biomedical applications to prevent or reduce the occurrence of stress shielding. This paper shows some ways that are used to produce new Ti-alloys with low Young's modulus for biomedical applications. The different factors that affect the Young's modulus such as the phase's stability, role of alloying elements, plastic deformation, and texturing are discussed. The low-cost and low-Young's modulus Ti-alloys (i.e., alloys composed mainly of the common elements and/or contains a minimum amount of the high-cost rare elements) are also discussed.

Investigations into Ti-15Mo-W Alloys Developed for Medical Applications

“…As implant metallic biomaterials, Ti-based alloys are used intensively because of the very good biological compatibility, excellent mechanical properties, and their corrosion-resistance to the fluids of the human body and the environment. Recently, titanium β-alloys become one of the most current subjects in the domain of biomedical Ti alloys for the lower elastic modulus compared to the classical titanium alloys [26,27,28,29]. Phase stability and some mechanical properties and corrosion properties in Ti-based alloys can be predicted by parameters such as the order of the bond (Bo), the energy level of the orbital d (Md) [30], the valence electron/atom ratio (e/a) [5], and the equivalent of Mo [31].…”