Modifications of surface properties of beta Ti by laser gas diffusion nitriding
Affiliation
University of Chester; Queen's University; The Hong Kong Polytechnic UniversityPublication Date
2016-03-31
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b-type Ti-alloy is a promising biomedical implant material as it has a low Young’s modulus and is also known to have inferior surface hardness. Various surface treatments can be applied to enhance the surface hardness. Physical vapor deposition and chemical vapor deposition are two examples of this but these techniques have limitations such as poor interfacial adhesion and high distortion. Laser surface treatment is a relatively new surface modification method to enhance the surface hardness but its application is still not accepted by the industry. The major problem of this process involves surface melting which results in higher surface roughness after the laser surface treatment.This paper will report the results achieved by a 100W CW fiber laser for laser surface treatment without the surface being melted. Laser processing parameters were carefully selected so that the surface could be treated without surface melting and thus the surface finish of the component could be maintained. The surface and microstructural characteristics of the treated samples were examined using x-ray diffractometry, optical microscopy, three-dimensional surface profile and contact angle measurements, and nanoindentation test.Citation
g, C.-H., Chan, C.-W., Man, H.-C., Waugh, D., & Lawrence, J. (2016). Modifications of surface properties of beta Ti by laser gas diffusion nitriding. Journal of Laser Applications, 28(2), 022505. doi: doi:http://dx.doi.org/10.2351/1.4944000Publisher
American Institute of PhysicsJournal
Journal of Laser ApplicationsAdditional Links
http://scitation.aip.org/content/lia/journal/jlaType
ArticleLanguage
enEISSN
1938-1387Sponsors
The work described in this paper was supported by research grants (G-YK36 and G-YM75) from the Hong Kong Polytechnic University, Hong Kong Special Administration Region, China. The Ph.D. studentship of Chi-Ho Ng was supported by the University of Chester, UK.ae974a485f413a2113503eed53cd6c53
10.2351/1.4944000
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