Evaluation of Mechanical Properties of Al6061 Reinforced with Hematite

Abstract

The Metal Matrix Composites (MMCs) are being used in many engineering and structural applications in the recent years due to their high strength to weight ratios (1, 2). In the present work an attempt has been made to fabricate a new composite with Al6061 as matrix material and Hematite also known as ferrous oxide (Fe2O3) as reinforcement. The need for higher strength and higher hardness of the composite has initiated the present investigation. The Hematite reinforcement was added to Al6061in different proportions (2, 4, 6 & 8 %) by weight and composites were prepared by Liquid Metallurgy (stir casting) technique through the vortex method. The casted composite specimens were machined as per ASTM standards. The Mechanical properties were evaluated and compared with base alloy. Significant improvement in hardness and tensile strength were observed with the increase in the wt % Fe2O3. The microstructural studies of the composite showed a better dispersion of the Fe2O3 in the matrix.