Dry sliding wear response of A413 alloy: Influence of intermetallics and test parameters

Intermetallic particles of Al3Ti, TiB2, AlB2 and Al4Sr were added to A413 alloy, and sliding wear tests were carried out under dry sliding conditions at room temperature as well as at high temperatures of 60, 120, and 180 °C. The results demonstrate that contacting surfaces at high temperature conditions are susceptible to oxidation and the wear rate of reinforced alloys is reduced. This is due to the formation of glazing layer that offers protection. Moreover, intermetallic particles played an important role as grain modifier/refiner and were responsible for reduced wear and friction.

► Al–Si with Al3Ti, TiB2, AlB2, Al4Sr intermetallics showed good sliding wear results.
► Wear rate of A413 and its composites decreases with increase in the temperature.
► Oxide film formation is more rapid at high operating temperatures.
► Oxide layers prevent the direct metal to metal contact of surfaces during sliding.