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“Effect of grain refinement and modification on the dry sliding wear behaviour of eutectic Al– Si alloys using gravity die casting”

The present study deals with an investigation of dry sliding wear behavior of grain refined and modified eutectic Al–Si alloys. Al–Si alloy by using a Pin-On-Disc machine. The indigenously developed Al–3Ti– 1B and Al–10Sr master alloys were used as grain refiner and modifier for the grain refinement of α-Al dendrites and modification of Si, respectively. Various parameters have been studied such as alloy composition, sliding speed, different time duration and normal load. The cast alloys and master alloys were characterized by optical microscope analysis. Results suggest that, the wear resistance of Al–Si alloys increases with the addition of grain refiner (Al–3Ti–1B) and modifier (Al–10Sr).