Low density, low expansion and high resistance to corrosion at ambient temperature, high strength to weight ratio, high wear resistance and low coefficient of thermal expansion make the aluminium– silicon alloys very suitable for wear resistance components in the automotive industry. In this study, the dry sliding wear behaviour of Al–Si alloy have been investigated. The cylindrical shaped wear testing specimens were prepared from casting. The wear experiments were carried out on pin-on disc type wear testing machine. Various parameters such as alloy composition, normal pressure, sliding speed and sliding distance were studied on the hypereutectic Al–Si alloys at elevated temperatures. Tests are conducted for varying normal pressure from 0.20 N/mm2 to 0.98 N/mm2, for varying sliding velocity from 0.94m/s to 3.77 m/s and varying sliding distance from 282.74 m to 1696.46 m. The extent of wear damage was estimated by means of weight loss technique. Worn surfaces were examined and analyzed by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results suggest that the wear resistance increases as the temperature increases due to the oxide layer formation. The results also suggest that the wear resistance decreases as the silicon content increases. The addition of Phosphorus to Al-Si alloys increases the wear resistance at elevated temperatures.
