Microstructure and elastic modulus evolution of TiTaNb alloys.

Wei, T Y; Huang, J C; Chao, Chih-Yeh; Wei, L L; Tsai, M T; Chen, Y H · J Mech Behav Biomed Mater · 2018

basic_science · Level V

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Abstract

In order to develop Ti based alloys with promising biocompatibility and matching mechanical response with human bone, TiTaNb alloys with 15, 23 and 30 mass% Ta are designed and systematically examined in terms of microstructural evolution and mechanical response. The Ti-30mass%Ta-10mass%Nb is demonstrated to be satisfactory with an elastic modulus ~60 GPa, hardness ~3.1 GPa, and strength ~1250 MPa. The evolution trend of the resulting microstructure and phases as a function of Ta content and annealing temperature are established. The relationship between the various phase amounts and alloy moduli is explored.

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