Modifications of Surface Properties of Beta Ti by Laser Surface Treatment

Chi-ho Ng, Chi-Wai Chan, Hau-Chung Man, David Waugh, Jonathan Lawrence

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β -type Ti-alloy is a promising biomedical implant material as it has a low Young’s modulus but is also known to have inferior surface hardness. Various surface treatments can be applied to enhance the surface hardness. Physical vapour deposition (PVD) and chemical vapour deposition (CVD) 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 100 W 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 (XRD), optical microscopy (OM), 3-D surface profile & contact angle measurements and nano-indentation test.
Original languageEnglish
Number of pages6
Publication statusPublished - 18 Oct 2015
EventThe 34th International Congress on Applications of Lasers & Electro-optics - Sheraton Atlanta Hotel, Atlanta, GA, US, United States
Duration: 18 Oct 201522 Oct 2015


ConferenceThe 34th International Congress on Applications of Lasers & Electro-optics
Country/TerritoryUnited States
CityAtlanta, GA, US

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Metals and Alloys


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