Experimental investigation on mechanical and tribological behaviour of al6061 sic tib2 hybrid composites synthesized through stir casting method

Abstract

Aluminum alloy materials are widely found to be the best alternatives for replacing existing conventional materials because of their high strength to weight ratio, low coefficient of thermal expansion, and lesser density. Al6061 alloys are extensively used as construction material in automobile, marine, and aerospace applications. A combination of Al6061-SiC composites is widely used to manufacture bearing surfaces, bushes, gears, cylinder liners, pistons, and camshafts for aerospace, marine, and automotive applications. However, due to the poor density and higher level of porosity, the usages of Al6061-SiC composites are limited. The Purpose of the study is to improve the mechanical, tribological, and corrosion behavior of the Al606l SiC-TiB2 composites to widen the engineering application of the Al6061 alloy.The Al6061 5%SiC TiB2 hybrid composite samples were synthesized using the stir casting method by considering optimal process parameters in which the amount of reinforcement of 5%SiC is kept constant, and the secondary reinforcement of TiB2 is varied by its weight fraction of 2, 4, 6, 8 and 10% respectively. The chemical alloying elements present in the prepared composites were analysed The theoretical and experimental densities of the produced hybrid composites were calculated using the rule of mixture and Archimedesand#8223; principle, respectively. The experimental density values of hybrid composites were increased by an average net increment of 15.2% compared to the least concentrated hybrid composite newline