Microstructure and mechanical properties of beta type Ti-Fe based alloys

Document Type

Book Chapter

Publication Title

Development and Application of Biomedical Titanium Alloys

Publisher

Bentham Science Publishers

Place of Publication

Sharjah, UAE

School

School of Engineering

RAS ID

26918

Comments

Wang, L., & Zhang, L. (2018). Microstructure and mechanical properties of beta type Ti-Fe based alloys. In L. Wang & L. C. Zhang (Eds.), Development and application of biomedical titanium alloys (pp. 51-72). Bentham Science. http://www.eurekaselect.com/chapter/12043

Abstract

Novel non-toxic β-Ti alloys have been developed and used in the next generation of metallic implants to replace the present utilized near α-type CP-Ti and (α+β)-type Ti-6Al-4V alloy in orthopaedic applications. Nevertheless, the vast majority of these newly β-type Ti alloys are containing a substantial concentration of costly elements like Ta, Nb and Zr with high density and high melting points. Therefore, it is highly desirable to design new β-type biomedical Ti alloys composed of non-toxic, low-cost, abundant metals to lower fraction of high-cost elements. Very recently, some serials of Ti-xFe-yTa, Ti-Fe-xNb and Ti-Nb-xFe alloys have been developed by using the DV-Xα molecular orbital method. The mechanical properties of the alloys can be evaluated by studying the effects of Ta, Fe and Nb contents on phase transition, β phase stability and microstructure evolution, and compared with the currently applied biological materials to determine its suitability. In the currently designed alloys, Ti- 10Fe-10Ta, Ti-7Fe-11Nb and Ti-11Nb-9Fe display the excellent combination of mechanical properties, which make them more attractive compared with the conventionally used CP-Ti and Ti-6Al- 4V materials for biomedical applications. Compared to CP-Ti and Ti-6Al-4V alloys, a new type of Ti alloy with better performance for orthopaedic applications can be designed by appropriate alloy design.

DOI

10.2174/9781681086194118010005

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