Mechanical and tribological behaviour of al 7075 hybrid mnc’s using stir casting method

Abstract

Nanocomposites in the metal matrix due to their high strength, good corrosion resistance and good resistance to wear, play a significant function in various engineering sectors of aerospace, automotive, defense, and marine. In this investigation, efforts have been provided to increase the wear and mechanical characteristics of HAMCs. Al 7075 was selected as matrix and silicon carbide (50nm), aluminium oxide (30nm) particles (0%, 2.0%, 4.0%, 6.0%, and 8.0wt. %). Magnesium has been incorporated (1.0%) to improve the wettability of SiC and Al2O3 nanoparticles in the aluminum alloy. The nanocomposites are made using the liquid state (stir casting) process. The analysis of optical microscopy revealed the microstructure of the hybrid nanocompositesAl7075/Al2O3/SiC. Nanoparticles, such as silicon carbide and aluminum oxide were evenly distributed in the Al matrix that could be examined using an SEM (scanning electron microscope). The results show that by adding nano reinforcement particulates in the molten matrix, wear and mechanicalcharceteristics increase compared to base alloy Al 7075.