Abstract
Ti-6Al-4V alloy finds wide application starting from aerospace to bio-mechanical industry due to its high strength-to-weight ratio and biological immunity, but it exhibits poor tribological properties. With the help of laser energy, a composite coating was developed on Ti-6Al-4V with preplaced powders as Al, TiO2, and hexagonal BN. A self-propagating high-temperature synthesis (SHS) reaction occurred between the preplaced powders by laser triggering, which helped to generate coating on the substrate. Microstructure and elemental analysis of coating were studied through SEM, EDS, and XRD analysis and it was found that the coating consisted of Al2O3, TiB2, and TiN. Hardness and wear resistance of the developed coating were improved significantly. Maximum hardness on coating was found to be more than six times higher than substrate hardness, and wear resistance was improved three times as compared to the substrate. The coefficient of friction of coating was comparable to substrate coefficient friction.
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Dey, D., Bal, K.S., Khan, I., Bangia, I., Singh, A.K., Roy Choudhury, A. (2019). Increase in Hardness and Wear Resistance of Ti-6Al-4V Surface by In Situ Laser Coating of Ti- and Al-Based Hard Ceramics. In: Shunmugam, M., Kanthababu, M. (eds) Advances in Micro and Nano Manufacturing and Surface Engineering. Lecture Notes on Multidisciplinary Industrial Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-32-9425-7_61
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DOI: https://doi.org/10.1007/978-981-32-9425-7_61
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