INVESTIGATION OF MECHANICAL AND CORROSION PROPERTIES OF AL 7075/GARNET METAL MATRIX COMPOSITES BY TWO-STAGE STIR CASTING PROCESS

Abstract

The impact of Garnet addition into the AL7075 Aluminium matrix on the physical, mechanical and corrosion properties are studied in this research paper. Al 7075/garnet composites are fabricated by using two-stage stir casting method in different (0, 5, 10, 15) volume percentages. Photomicrograph of prepared samples revealed the uniform distribution of garnet reinforcement into the base matrix. The corrosion rate is calculated by potentiodynamic polarization method. The actual density is increased by around 1.2% for Al 7075/garnet (15%) composite as compared to base alloy. Micro hardness of Al 7075/garnet (15%) composite is raised by around 47 (34%) compare to as cast base matrix. Al7075/garnet (15%) composite tensile strength stood at 252 Mpa, which is 40% greater than the base alloy. Al 7075/15% garnet composites reduce around 97% of corrosion rate than the base matrix. Alloy elements influenced the corrosion than Garnet reinforcement.