The room temperature mechanical properties and high temperature creep behavior of AZ91 alloy reinforced with SiC p synthesized via stir casting have been evaluated. The mechanical properties showed improvement with respect to the amount of reinforcement content. The creep testing of the composites carried out at a temperature of 175 C under constant stress of 80, 100 and 120 MPa reveals different creep characteristics depending upon the reinforcement content and the applied load. The true stress exponents of different composites calculated from minimum creep rate indicate the possible mechanisms of creep deformation.

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Tribological attributes of Mg-alloy (AZ91D) based composites reinforced with 5, 10, 15, 20 and 25 wt% of silicon carbide particle (SiC p) synthesized by stir casting technique are being investigated. The composites show uniform distribution of SiC p and possess refined grains in comparison with the monolithic alloy. The cleaner interface depicts splendid interfacial bonding. The dry sliding wear behavior of the composites has been characterized using a pin on disc wear testing machine at two different normal loads of 19.6 and 39.4N. The volumetric wear rate, wear resistance and coefficient of friction for the composites shows phenomenal variations with fluctuations in load and SiC p content. Scanning electron micrographs of wear surface and wear debris provide excellent insight of the type of wear involved.