Wear Behaviour and Mechanical Properties of AA2024/Al2O3/SiC/Gr HMMC Using Advanced Squeeze Casting Technique

Abstract

Hybrid metal matrix composites (HMMC) play a vital role in meeting the global needs in automotive applications for low-cost, high-performance, and quality materials with excellent mechanical and thermal properties. The study aims to explore the wear and mechanical properties of AA2024-reinforced Al2O3/SiC/Gr with different weight fractions using liquid metallurgy route particularly in advanced squeeze casting technique. Different wt% of Al2O3/SiC/Gr reinforcement is added to AA2024 and the effect of this combination on the material is evaluated based on its tensile strength, hardness, wear rate and compressive strength. The fabricated specimens were prepared and tested as per the ASTM standard. The results show that increased reinforcement up to 9 wt% has better hardness and tensile strength. On the other hand, the reinforcement metal matrix with Al2O3/SiC/Gr particles up to 9 wt% shows less wear rate and high compressive strength. Wear worn surface shows that fragments from the inner part of the material forms a layer on the composite surface.