Enhancement of Wear and Corrosion Resistance of Beta Titanium Alloy by Laser Technology
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Authors
Chan, Chi-WaiLee, Seunghwan
Smith, Graham C.
Sarri, Gianluca
Ng, Chi-Ho
Sharba, Ahmed
Man, Hau-Chung
Affiliation
Queens University Belfast (Chan, Sharba); Technical University of Denmark (Lee); University of Chester (Smith, Ng); Hong Kong Polytechnic University (Man)Publication Date
2016-03-30
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The relatively high elastic modulus coupled with the presence of toxic vanadium (V) in Ti6Al4V alloy has long been a concern in orthopaedic applications. To solve the problem, a variety of non-toxic and low modulus beta-titanium (beta-Ti) alloys have been developed. Among the beta-Ti alloy family, the quaternary Ti-Nb-Zr-Ta (TZNT) alloys have received the highest attention as a promising replacement for Ti6Al4V due to their lower elastic modulus and outstanding long term stability against corrosion in biological environments. However, the inferior wear resistance of TNZT is still a problem that must be resolved before commercialising in the orthopaedic market. In this work, a newly-developed laser surface treatment technique was employed to improve the surface properties of Ti-35.3Nb-7.3Zr-5.7Ta alloy. The surface microstructure and composition of the laser-treated TNZT surface were examined by grazing incidence x-ray diffraction (GI-XRD) and x-ray photoelectron spectroscopy (XPS). The wear and corrosion resistance were evaluated by pin-on-plate sliding test and anodic polarisation test in Hanks’ solution. The experimental results were compared with the untreated (or base) TNZT material. The research findings showed that the laser surface treatment technique reported in this work can effectively improve the wear and corrosion resistance of TNZT. The enhancement of such surface properties was due to the formation of a smooth and hard layer on the substrate surface. The laser-formed layer was metallurgically bonded to the substrate, and had no concern of coating delamination or peel-off.Citation
Chan, C.-W., Lee, S., Smith, G., Sarri, G., Ng, C.-H., Sharba, A., & Man, H.-C. (2016). Applied Surface Science, 367, 80-90.Publisher
ElsevierJournal
Applied Surface ScienceAdditional Links
http://www.sciencedirect.com/science/article/pii/S0169433216001288Type
ArticleLanguage
enISSN
0169-4332Sponsors
Acknowledgments The work described in this paper was supported by research grants from the Hong Kong Polytechnic University (G-YK36 and G-YM75), Hong Kong Special Administration Region, China, and the Queen’s University Belfast (Start-up Research Fund: D8201MAS), United Kingdom.ae974a485f413a2113503eed53cd6c53
10.1016/j.apsusc.2016.01.091
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