Abstract
The present study aims at enhancing the wear resistance of Ti –6 Al –4 V by laser surface nitriding. Laser surface treatment has been carried out by melting of the sand blasted Ti –6 Al –4 V substrate using a high power continuous wave Diode laser with nitrogen as shrouding environment (at a gas flow rate of 51/min). Laser surface nitriding led to formation of dendrites of titanium nitrides. The microhardness is improved to a maximum of 900–950 VHN (Vickers hardness number) in laser surface nitriding as compared to 260 VHN of the as-received substrate. Surface nitriding increased primary potential for pit formation (Epp1) as compared to Ti –6 Al –4 V . Biocompatibility behavior showed a better cell viability due to surface nitriding as compared to the as-received Ti –6 Al –4 V .
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