Microstructure and wear resistance of Ti–Cu–N composite coating prepared via laser cladding/laser nitriding technology on Ti–6Al–4V alloy
Source abstract
Abstract
Ti–Cu–N coatings with three different Cu contents on Ti–6Al–4V alloy (TC4) were obtained via laser cladding together with laser nitriding (LC/LN) technology. Phase constituents, microstructure, microhardness, and wear resistance of the coatings were investigated. The evolution of the coefficients of friction for the three coatings was measured under dry sliding conditions as a function of the revolutions until the coating failure. The results show that the coatings are mainly composed of TiN, CuTi3 and some TiO6 phases dispersed in the matrix. A good metallurgical bonding between the coating and substrate has been successfully obtained. The prepared Ti–Cu–N composite coatings almost doubly enhance the microhardness of the TC4 alloy and reduce the friction down to 1/4–1/2 of the TC4 alloy, and thus significantly improve the wear resistance. The coefficient of friction depends on the Cu content in the coating.
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Research context
OpenAlex topics: Metal and Thin Film Mechanics · High Entropy Alloys Studies · Advanced materials and composites
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