Abstract
The modification of surface layer of machine elements used for engineering applications requires modern tools and techniques for improving its functional aspect and enhanced life. In this study, modification of surface layer was done by combining laser texturing and filling the textured surface by hard wear-resistant coating. This study aimed at investigating the friction and wear behavior of nano aluminum chromium nitride (AlCrN) composite coating over modified titanium alloy (Ti6Al4V) surfaces under dry sliding contact condition. The surface of as-received titanium alloy substrate was lapped and laser surface texturing was performed on the lapped surface. Magnetron-sputtered physical vapor deposition technique was preferred for coating. Scanning electron microscope, energy dispersive X-ray and microhardness tests were performed to characterize the coating. Further, to evaluate the bonding strength of coating against modified surfaces, scratch tests were performed by a scratch tester. Using pin-on-disc tribometer, the coated samples were subjected to tribological investigation for dry sliding contact conditions. The effect of normal load on friction and wear characteristics were examined and discussed. The performance of these coatings on textured and lapped surfaces was compared. Critical parameters such as variation in coefficient of friction and specific wear rate were reported. The influence of textured surface on coating performance was discussed.
Get full access to this article
View all access options for this article.