Fabrication of aluminium AA7075 reinforced by zinc metal matrix composites and their wear behaviour analysis

Abstract

In this study, we report effects of zinc on casted aluminium 7075 by using of stir casted method. The volume fraction of composites is prepared by density method. Stir casted composites are fabricated in different volume-fraction levels. Microstructure analysis of alloy and nanocomposites are performed by using SEM. Dry sliding wear is measured on pin-on-disc testing apparatus at various testing conditions for alloy and nanocomposite materials. As shown with the obtained results, the wear resistance increases with increasing the wt.% of reinforcing zinc nanoparticles. The different volume fractions of fabricated composites are shown, which leads to decreasing the wear rate from 40% to 60%. The nanoparticles' sizes, microstructure, and wear rate are approximated from high-resolution diffraction analysis.