Abstract
The modern study deals with the fabrication of aluminium/boron carbide/graphite hybrid metal matrix composite and investigation on its tribological behaviour. The composite incorporated 3 wt% of B4C and 4 wt% of Gr particles with a size 200 mesh fabricated through stir casting. The microstructure of this composite inspected and uniform distribution of reinforced particles in the matrix observed. Wear experiments conducted on pin-on-disc tester based on Taguchi's L9 orthogonal arrays using three process parameters such as load, sliding velocity and distance; each varied for three levels. Loads of 20 N, 40 N, 60 N; velocities of 2 m/s, 4 m/s, 6 m/s and distances of 1,000 m, 2,000 m, 3,000 m considered for analysing the wear behaviour of composite. The main parameters originated out using signal-to-noise ratio by selecting 'smaller-the-better' characteristics for wear rates and COF. Worn out surfaces of the composite specimen were analysed using SEM for predicting the wear mechanism. The materials with ALMMCs have better wear characteristics.
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