Abstract
In this study; an advanced ultrasonic assisted stir casting technique has been adopted to incorporate nano-sized Al2O3particle into aluminum alloy 6061 to form particulate nano composite material. Dry sliding wear testing of Aluminum matrix nano composites were performed before and after heat treatment using a pin-on-disc tribometer. The content of Al2O3 nano particles in the composite was varied from 0 to 3.0 weight% and the effect of parameters on wear rate were studied. The sliding wear test is conducted for different loads, speeds and weight % of nano Al2O3particles. The results have shown that wear rate of composite reduces with increasing the nano alumina content. For the same working conditions and processing parameter, wear rate increases with increase in load and with increase in speed. Also, a significant improvement in wear resistance was observed in the heat treated Al-Al2O3 nano-composite as compared un-heat treated composite samples.
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