Optimization of wear behaviour of Al7075/SiC/Al2O3 MMCs Using statistical method

Abstract

ABSTRACT The metal matrix composites are widely used in various engineering applications. The fabrication of MMCs with different wt. % of reinforcements helps to improve the mechanical and the wear properties. In this research work, different wt. % of ceramic reinforcements with Al-7075 alloy were used to fabricate the hybrid MMCs routed through liquid metallurgical technique. The hardness of the fabricated composites was measured using Vickers hardness tester. The obtained results revealed that the hardness values increased by increase in the wt. % of reinforcement. Wear behaviour of composites was studied using pin on disc wear test equipment under dry-sliding conditions. Experimental trials were carried out based on the Taguchi method. L27 OA (Orthogonal array) was used for investigation of the data. Effect of the wear parameters on the wear and coefficient of friction were studied using ANOVA technique. ANOVA results revealed that the wt. % of reinforcement has a substantial influence on wear loss and COF. Finally, the orthogonal array results were verified by conducting confirmatory tests. The wear mechanism of the worn-out surface was analysed using SEM and EDS analysis.