Nano-second UV laser processed micro-grooves on Ti6Al4V for biomedical applications |
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Authors: | A.Y. Fasasi S. Mwenifumbo N. Rahbar J. Chen M. Li A.C. Beye C.B. Arnold W.O. Soboyejo |
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Affiliation: | 1. Center for Energy Research & Development, Obafemi Awolowo University, Nigeria;2. Princeton Institute for the Science and Technology of Materials (PRISM), Princeton, NJ 08540, USA;3. Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA;4. Spectra-Physics, Inc., 1330 Terra Bella Ave., Mountain View, CA 94043, USA;5. Department of Physics, Cheikh Anta Diop University, Dakar, Senegal |
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Abstract: | Laser surface texturing can be used to produce well defined micro-grooves on biomedical materials such as Ti-6Al-4V. Such micro-grooves can be optimized to improve the integration with surrounding tissue. This paper examines the effects of Gaussian shaped beam profiles for nano-second laser processing on the laser micro-groove geometry, topography, and micro-structure of Ti-6Al-4V under atmospheric conditions. Laser and machining parameters such as pulse rate, scan speed, wavelength, groove width and pitch are shown to affect the resulting micro-groove geometries. In contrast to prior micro-groove studies using top-hat beam profiles with ultra-violet (UV) Excimer lasers or large area masking techniques, grooves produced with Nd:YVO4 exhibit improved roughness parameters and reduced heat-affected zones. Initial processing parameters are established for the fabrication of micro-groove geometries on flat geometries that are relevant to biomedical implants and devices. |
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