Enhancing Mechanical Performance of AA6061 Hybrid Metal Matrix Composites: A Stir Casting Investigation with MgO and SiC Reinforcements

Abstract

The use of Aluminium Metal Matrix Composites (AMMCs) has gained considerable recognition in aerospace and structural applications due to its excellent corrosion resistance, good wear resistance, high strength, and lightweight properties. This paper presents an experimental study that investigates the influence of reinforcement particles, specifically Magnesium Oxide and Silicon Carbide, on various mechanical properties of Aluminium Alloy (Al 6061).The AMMCs were produced through the stir casting method, utilizing the ex-situ approach for its simplicity. Different weight percentages of reinforcing particles, namely 3%, 6%, and 9%, were incorporated to form the MMC specimens. After fabrication, the ingots were machined to create test samples, which underwent a series of mechanical tests, including tensile, compression, impact, and hardness tests. These tests aimed to assess the impact of varying weight percentages of reinforcements on the mechanical properties of the material.The results revealed a gradual increase in both tensile and compression strength with the addition of magnesium oxide and silicon carbide. The study demonstrates the potential for enhancing the mechanical properties of Aluminium Alloys through the incorporation of these reinforcing particles.