A Study on Effect of Chill Casting on Dry Sand Abrasive Wear Behaviour on A356 Reinforced with Hematite Metal Matrix Composite

Abstract

Aluminium alloy constituents are best alternative because of its unique capacity for designing the material to the required essential properties. Aluminium metal matrix composites (AMMCs) are increasing wide spread acceptance in the field of automobile, aerospace, and industrial application because of its, high strength, low density, and good structural rigidity. In this manuscript an attempt is made to study the influence of copper chills in Aluminium MMC’s, and also to investigate the wear characteristics of the contrived Aluminium A356-Hematite particulate composite are fabricated through sand casting technique with and without copper chills in order to get Homogeneous and isotropic material properties under liquid metallurgical technique by different weight percentage of Hematite particulates ranges from 0wt to 12wt% in phases of 3wt%. Test samples were prepared as per ASTM standards. The Microstructure study reveals that uniform dispersal of Hematite particulates in the A356 matrix alloy and the rapid cooling rate is enforcing to get fine grained structure by use of copper chill which intern improves the tribological properties. An increase in reinforcement percentage in the matrix alloy there will be a decrease in abrasive wear rate further the consequence of load increases abrasive wear rate decreases for copper chill specimen compared to as-cast specimen.