Medical titanium alloy

Titanium is non-toxic, light, strong and has excellent biocompatibility, is an ideal medical metal material, can be used as implants into the human body. At present, Ti-6 Al-4v ELI alloys are still widely used in the field of medicine. However, the latter will precipitate very small amounts of radon and aluminum ions, reduce their cell adaptability and may cause harm to the human body, the problem has long attracted widespread attention in the medical community.
As early as the mid-1980s, the United States began to develop aluminum-free, molybdenum-free, biocompatible titanium alloy, it is used in orthopaedics.
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 range of α with excellent biocompatible β titanium alloys, including Ti-15Zr-4Nb_4ta-0.2Pd, Ti-15Zr-4Nb-aTa-0.2Pd 0.20 to 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 superior to those of the Ti-6Al-4v ELI. Titanium alloys β have higher strength, better incision properties and toughness than α-β titanium alloys, and are better suited for implantation into the body as implants. In the United States, five β titanium alloys have been recommended for medical use, namely TMZFTM (TI-12Mo-Zr-2Fe), Ti-13Nb-13Zr, Timetal 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 ti-6 Al-4V ELI alloys with high strength, low elasticity modulus and excellent forming and corrosion resistance are likely to replace the Ti-6Al-4V ELI alloys, which are widely used in the medical field.

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