Comparative Investigation of Mechanical Properties of Aluminium Based Hybrid Metal Matrix Composites

Aluminium alloys are widely used in automobile industries and aerospace applications due to their great mechanical properties, low density, low coefficient of thermal expansion, better corrosion resistance and wear as compared with conventional metals and alloys. The low production cost and better mechanical properties of composites makes them very useful for various applications in many areas from technological point of view. The aim involved in designing aluminium based metal matrix composite by combining different percentage of particulates in the mixture. Present study is focused on the fabrication of two aluminium 6063 based metal matrix composites. One reinforced with silicon carbide, graphite and second reinforced with silicon carbide, boron carbide by stir casting technique. The percentage of each reinforcement particulate is kept 10% in two composites. The various mechanical tests like tensile strength test, ultimate tensile strength test, flexural test & hardness test performed on the samples obtained by stir casting technique for comparison purpose. The result indicated that the developed method is quite successful and there is an increase in the value of tensile strength, ultimate tensile strength, hardness value and flexural strength of newly developed composite having SiC and B4C particulates in comparison to the SiC, graphite reinforced composite.