Microstructure and Mechanical Properties of Al7075-TiB 2 in-situ composite

Abstract

Al7075-TiB 2 in-situ composite was processed by stir casting technique using commercially available Al-10%Ti and Al-3%Br master alloys. Both matrix alloy and composite were subjected to microstructure analysis, microhardness test, grain size studies and tensile test. Microstructure shows fairly uniform distribution of TiB 2 particles in matrix alloy. Average grain size of the composite was lower than unreinforced alloy. Microhardness, yield strength and ultimate tensile strength of Al7075-TiB 2 composite are considerably higher when compared with unreinforced alloy. However, the ductility of the composite was decreased when compared with unreinforced alloy.