Mechanical Characterization of Aluminium Alloy /Alumina Nano Composites Under Controlled Solidification employing Chills

Abstract

A composite material is formed by combining two or more chemically distinct and insoluble phases, showcasing properties and structural capabilities that surpass those of the individual components when acting independently. In the field of engineering, aluminum alloy holds considerable significance and is extensively utilized in the aircraft and aerospace industry for the fabrication of various parts and components. Its appeal as a metal matrix composite lies in its impressive strength-to-density ratio. This research centers on the mechanical characterization of aluminum alloy (Al2024) / alumina nano composites (Al₂O₃) achieved through controlled solidification using chills. The creation of the Aluminum (Al2024) alloy / Alumina Nano-Composite was conducted, influenced by both ferrous and nonferrous end chills. Mechanical tests revealed improved ultimate tensile strength up to 150 N/mm² for copper chill of 9 wt% nano alumina reinforcement and also observed the composite with 9 wt% nano alumina reinforcement, cast with a copper chill, has the highest Vikers hardness value of 116, showcasing superior performance compared to other utilized chills.