Characterization of Microstructure and Electrochemical Behaviour of a New Ti-8Mo-4Sn-2Mg alloy for Biomedical Applications

International Journal of Mechanical Engineering

© 2019 by SSRG - IJME Journal

Volume 6 Issue 9

Year of Publication : 2019

Authors : Paul S. Nnamchi , Camillus S.Obayi ,Romanus E. Njoku

10.14445/23488360/IJME-V6I9P102

How to Cite?

Paul S. Nnamchi , Camillus S.Obayi ,Romanus E. Njoku, "Characterization of Microstructure and Electrochemical Behaviour of a New Ti-8Mo-4Sn-2Mg alloy for Biomedical Applications," SSRG International Journal of Mechanical Engineering, vol. 6,  no. 9, pp. 4-11, 2019. Crossref, https://doi.org/10.14445/23488360/IJME-V6I9P102

Abstract:

β type Ti-Mo alloys are especially interesting for orthopedic implants due to its lightweight, excellent mechanical behavior, and corrosion resistance. However, high elastic modulus remains a major setback to its biomedical application. For this, a new βeta-Ti-8Mo-4Sn-2Mg alloy for the biomedical applicationwas designed, and its mechanical and corrosion behaviors ascertained using compressive and Potentiodynamic polarization corrosion tests, respectively. The base and new alloys' elastic moduli were determined using both ultrasonic resonance frequency and Nano-indentation techniques. The microstructures of the alloys were characterized by X-ray diffraction and scanning electron microscopy. The result shows that the elastic moduli were reduced to bone matching values without impacting mechanical performance by adding Mg and Sn. The combination of high strength, low Young's modulus, biocompatibility, and excellent corrosion resistance properties of the new βeta-Ti-8Mo-4Sn-2Mg alloy makes it a favorable candidate for orthopedic applications.

Keywords:

titanium alloys; electrochemical properties; low Young's modulus; biomedical applications;magnesium; mechanical properties

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