INVESTIGATION OF WEAR BEHAVIOR OF Ti6Al4V / B4C COMPOSITES PRODUCED BY POWDER METALLURGY

Abstract

In this study, Ti6Al4V / B4C Metal Matrix Composite (MMC) was produced using powder metallurgy (PM) method. All powder metal materials mixed by adding 5%, 10% and 15% B4C by weight to the Ti6Al4V matrix were subjected to hot pressing at 950 0C. Pin on disc dry wear test was performed to determine the wear resistance of composite materials produced in different compositions. As a result of 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 B4C reinforced wear properties at different rates were investigated. It was determined that composite materials reinforced with B4C powder give better results than unreinforced Ti6Al4V and generally, as the amount of B4C 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 B4C reinforcement ratios, differences were observed in wear types and wear track depth. In the experimental studies, it was determined that the wear resistance changes directly with the B4C ratios reinforced by weight and the highest wear resistance is in composite materials with a B4C ratio of 15%.

Keywords

• Metal matrix composite
• Ti6Al4V
• B4C
• wear

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