Abstract

Aluminum matrix composites composed of Al, Al-5,6 wt.% Cu (Al5.6Cu), Al-7 wt.% of alpha brass α-Cu_0,8Zn_0,2 (Al7CuZn) and Al-9 wt.% of nickel brass Cu_0,64Zn_0,31Ni_0,05 (Al9CuZnNi) as the matrix and 15 vol.% of TiC and synthesized Al-Ti-C master alloy (MA) as the reinforcement were successfully fabricated by hot forging. Sliding wear tests were conducted at different velocity and loads using a pin- on-disc apparatus and under dry conditions. The results of the investigations indicate that the coefficient of friction significantly lower in composites with Al-Ti-C master alloy then that reinforced with TiC, while the wear rates are lower in composites with Cu additions. The post-test analysis of the material damage mechanisms were examined by optical profilometer.