Optimization of wear behaviour of hybrid Al(6061)-Al2O3-B4C composites through hybrid optimization method

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Al-based hybrid metal matrix composites were prepared through stir casting method by reinforcing aluminium oxide or alumina (Al2O3) and boron carbide (B4C) particles into Al matrix with their varying proportions. The wear analysis of prepared hybrid MMCs was performed using the Pin-on-disc method and wear parameters were also optimized with objectives of minimizing the weight loss (WL) and coefficient of friction (COF) through integrated Grey-Taguchi techniques. Morphological analysis was also performed to explain the wear mechanism through a Scanning electron microscope (SEM). The maximum improvement in the weight loss of 71.33 % and in coefficients of friction of 35.35 % was found for the hybrid composites as compared to that of Al-alloy matrix. Further, the ANOVA results suggested that compositions has the maximum contribution of 94.47 %, sliding speed has 1.06 %, sliding distance has 1.04 %, and load has 3.16 % on the wear performance of the present hybrid composites.