Production and investigation on Mechanical Properties of TiC reinforced Al7075 MMC

Abstract

Aluminium alloy (AA7075) is largely used in various fields of transport applications, including marine, automotive and aviation and aerospace due to their high strength-to-density ratio. The present work deals with the influence of TiC on the mechanical properties of AA 7075 Metal Matrix Composites (MMCs). TiC is particularly attractive as it offers high hardness and elastic modulus, low density, good wettability yet low chemical reactivity with aluminium melts. The aluminium metal matrix composites (AMMCs) are produced as AA 7075 matrix metal and TiC particulates of an average size of 40µm as reinforced particles through stir casting, Magnesium added to the melt to overcome the wetting problem between TiC and liquid AA7075 metal. AMMCs are produced in different %weight of TiC ranging between 3 to 7%. In this study, an attempt is made to predict hardness using micro Vickers hardness tester. Also ultimate tensile strength (UTS) of the composite are characterized. The test results showed increasing hardness and ultimate tensile strength of the composites compared with matrix (AA7075) because of the presence of the increased reinforced material (TiC)