Abstract

The present work is aimed at evaluating the effect of Mica and Kaolinite on hardness and impact strength of AA 7075 Composites. These Hybrid AMCs are finding applications in automobile, aircraft, space, marine and transportation applications. An effort is made to enhance the hardness and impact strength of AMCs by reinforcing AA 7075 matrix with varying different weight percentage of Mica and Kaolinite by stir casting method. Aluminum alloy matrix varying proportions of Mica and Kaolinite were fabricated. The microstructure, impact strength and hardness properties of the fabricated AMCs were analyzed. The optical microstructure images revealed the homogeneous dispersion of Mica and Kaolinite particles and in the matrix. Based on the results obtained from hardness test and impact test of the metal matrix composites it is observed that, the hardness and impact strength shows marked improvement as the increase in the amount of Mica and Kaolinite.