INVESTIGATION OF WEAR BEHAVIOR OF Ti6Al4V /$B{_4}C$ COMPOSITES PRODUCED BY POWDER METALLURGY

In this study, Ti6Al4V / B4C Metal Matrix Composite (MMC) was produced using powder metallurgy (PM) method. Ball-milled powders, containing 0, 5, 10, and 15 wt% $B{_4}C$ were hot compacted at 950 °C for 20 minute under 450 MPa pressure in ambient air. The wear tests performed at 300 rpm sliding speed, 300 m sliding distance and three different loads of 5N, 10N, 15N, the effects of Ti6Al4V compound on$B{_4}C$ reinforced wear properties at different rates were investigated. It was determined that composite materials reinforced with $B{_4}C$ powder give better results than unreinforced Ti6Al4V and generally, as the amount of $B{_4}C$ powder increases, the friction coefficient values decrease and the wear resistance increases. In the wear test, it was observed that the friction coefficient of all materials decreased as the load increased. As a result of the changes in$B{_4}C$ reinforcement ratios, differences were observed in wear types and wear track depth. The results of the study showed that the wear resistance increased in parallel with the $B{_4}C$ addition and the best wear resistance was obtained with the wt. 15% $B{_4}C$ added sample.