Abstract
Biomedical titanium alloys have been widely used as surgical implant materials, but traditional biomedical titanium alloys no longer meet practical needs, and there is an urgent need to develop new biomedical titanium alloys. In this study, the composition, microstructure, and mechanical properties of novel Ti-xNb-yZr-5Mo-6Sn-0.6O biomedical titanium alloys were investigated based on diffusion multiple high-throughput experiments. The results showed that although the microstructure of the alloys transitioned from β + α″ to β phase with the increase of Nb and Zr content, the β-stabilizing effect of Zr is weaker. The microhardness and elastic modulus of the alloys varied in the range of 2.7∼7.8GPa and 74.3∼130.2GPa, and depended strongly on the Nb content. In the Ti-xNb-yZr-5Mo-6Sn-0.6O system alloy, the Ti-7.8Nb-1.7Zr-5Mo-6Sn-0.6O alloy with the high hardness of 5.5 GPa and low elastic modulus of 74.3 GPa is a promising candidate for orthopedic implants. Moreover, this work indicates that high-throughput experiments are an effective method for rapidly developing high-performance biomedical titanium alloys.
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