Tensile and Wear Properties of TiC/7075 Composite Prepared by Melt in-Situ Synthesis

Abstract:

TiC/7075 composite was synthesized by melt in-situ synthesis. The TiC particulates were observed from SEM to be nearly spherical shape with an average size of less than 1.0 μm. The experimental results show that the tensile elongation of the composite is slightly decreased, but the tensile strength and yield strength are respectively improved about 35.8% and 42.2% than those of 7075 aluminum alloy, showing that the TiC particulates formed by in-suit reaction strengthen the matrix effectively. The results of wear experiment show that the wear resistance of 6wt％TiC/7075 composite is better than that of 7075 aluminum alloy under lower loading (9.1 N). The wear resistance of the same composite, however, is lower than that of 7075 aluminum alloy under higher loading (35.8 N). The effect of external load on the wear resistance of the materials was analyzed