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Modifications of Surface Properties of Beta Titanium by Laser Gas Diffusion Nitriding

Chi-Ho Ng, Chi-Wai Chan, Hau-Chung Man, David G. Waugh, Jonathan Lawrence

2015entitanium alloysbiomedical implantslaser treatmentsurface modificationnitridinghardness

Abstract

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This study investigates the modifications of surface properties of β-type Ti-alloy, a material recognized for its potential as a biomedical implant due to its low Young’s modulus but inferior surface hardness. Traditional surface enhancement methods, such as physical vapour deposition (PVD) and chemical vapour deposition (CVD), face limitations, including poor interfacial adhesion and high distortion. Consequently, laser surface treatment is explored as a novel approach, although its adoption is hindered by challenges like surface melting, leading to increased surface roughness. This paper presents findings from experiments utilizing a 100 W CW fiber laser for conducting laser surface treatment without melting the surface. A systematic selection of laser processing parameters enabled the treatment to occur while preserving the surface finish of the components. The treated samples' surface and microstructural characteristics were meticulously analyzed through various techniques, including X-ray diffractometry (XRD), optical microscopy (OM), 3-D surface profile, contact angle measurements, and nano-indentation tests, demonstrating the effectiveness of this approach in enhancing surface hardness without compromising finish.

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Cite This Work

@article{d973729d-535a-480b-907b-aedba475d1e5,
  title={Modifications of Surface Properties of Beta Titanium by Laser Gas Diffusion Nitriding},
  author={Chi-Ho Ng and Chi-Wai Chan and Hau-Chung Man and David G. Waugh and Jonathan Lawrence},
  year={2015},
  language={en}
}
TY  - JOUR
TI  - Modifications of Surface Properties of Beta Titanium by Laser Gas Diffusion Nitriding
AU  - Chi-Ho Ng
AU  - Chi-Wai Chan
AU  - Hau-Chung Man
AU  - David G. Waugh
AU  - Jonathan Lawrence
PY  - 2015
LA  - en
ER  -

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