Titanium is non-toxic, light-weight, high-strength, and has excellent biocompatibility. It is ideal medical metal material and can be used as an implant for implantation in the human body. At present, Ti-6Al-4vELI alloy is still widely used in the medical field. However, the latter will precipitate a very small amount of vanadium and aluminum ions, which reduces its cell suitability and may cause harm to the human body. This problem has long aroused widespread concern in the medical community. America as early as the mid-1980s
Beginning with the development of aluminum alloys, vanadium-free, and biocompatible titanium alloys, they are used in orthopedics. Japan, the United Kingdom, etc. have also done a lot of research work in this area and made some new progress. For example, Japan has developed a series of α + β titanium alloys with excellent biocompatibility, including Ti-15Zr-4Nb_4ta-0.2Pd, Ti-15Zr-4Nb-ATA-0.2Pd-0.20 ~ 0.05N, Ti-15Sn -4Nb-2Ta-0.2Pd and Ti-15Sn-4nb-2Ta-0.2Pd-0.20, the corrosion strength, fatigue strength, and corrosion resistance of these alloys are better than Ti-6Al-4v ELI. Compared with α + β titanium alloy, β titanium alloy has higher strength, better cutting performance, and toughness, and is more suitable for implantation in the human body. In the United States, 5 kinds of β titanium alloys have been recommended to the medical field, namely TMZFTM (TI-12Mo- ^ Zr-2Fe), Ti-13Nb-13Zr, Ti metal 21SRx (TI-15Mo-2.5Nb-0.2Si), Tiadyne 1610 (Ti-16Nb-9.5Hf) and Ti-15Mo. It is estimated that in the near future, such titanium alloys with high strength, low elastic modulus, excellent affordability, and corrosion resistance are likely to replace the Ti-6Al-4V ELI alloy widely used in the medical field.
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