Evaluation of wear response under reciprocating sliding of A390 alloy when squeeze casting pressure and stroke length vary

摘要

Components of cast aluminium alloys is the most important category of light metals. A390 alloy one of the aluminium alloys that has better wear resistance, high strength and low thermal expansion. Together with excellent castability and reduced density A390 is mostly utilized for heavy wear applications. The superior wear resistance is due to the hard silicon particles which precipitates throughout the aluminium matrix [1, 2, 3]. Reciprocating sliding contact results in a higher wear rate than a continuous wear system. Hence material system has to the tested separately under this type of contact [4, 5, 6, 7, 8], Squeeze Cast (SC) fabricated engineering components are reported to have fine grained structure, excellent surface finish, reduced porosity and improved mechanical properties compared to stir cast composites [9, 10].