Mechanical Properties of AA 7075-Nano ZrO2 Reinforced Matrix Composites

Abstract

Zircon reinforced composites are referred as a unique composite that exhibits relatively improved mechanical properties like high tensile strength and micro hardness compared to pure AA 7075 base metal. The present work aims to investigate that influence of reinforcement of ZrO2 nanoparticles are mechanical properties of AA 7075 alloy and composites prepared through stir casting method. Samples are fabricated through varying the weight percentage of ZrO2 2 and 4 wt%. Mechanical properties of AA 7075 and composites were observed in particulars of density, porosity, micro hardness, XRD of ZrO2 and tensile properties. Increased reinforcement contents enhance 15.92% of micro hardness, and 28.46% of tensile strength was noticed. However, the increase of particle concentration of reinforcement leads to diminishing of the percentage elongation.