Microstructure, mechanical properties and biocompatibility of novel Ti-20Zr-xMo alloys.

• A series of novel Ti–Zr–Mo alloys for biomedical application were prepared. • A single stable β alloy can be obtained when the Mo content is 15 wt%. • The biocompatibility of the alloy consisting of a single β-phase is better. • The corrosion resistance of the alloy with Mo is stronger than that without Mo. • The strength and plasticity increased obviously with the increase of Mo addition. [Display omitted] In this work, the microstructure, mechanical properties and biocompatibility of a novel Ti-Zr- x Mo (x = 0, 5, 10, 15, 20 wt%) alloys were systematically studied. A single stable β-phase is obtained in this study when the Mo content reaches 15 wt%. And the Ti-Zr-10Mo alloy reaches a maximum strength of about 1100 MPa due to the mechanism of second phase strengthening, solid solution strengthening and fine grain strengthening. However, the plasticity of the alloy is poor due to the precipitation of α' phase near the grain boundaries. Meanwhile, the biocompatibility of the alloy is discussed in this paper through in vitro experimental characterization, and it is found that the biocompatibility of the alloy consisting of a single β-phase is better. [ABSTRACT FROM AUTHOR]