Entropy-guided VIKOR technique for optimal selection of aluminium hybrid metal matrix composites

Abstract

The objective of this study is to assess the most suitable aluminum hybrid metal matrix composite through mechanical and physical characterizations utilizing the Entropy-VIKOR optimization method. To appraise the optimal composite, aluminum hybrid metal matrix composites were manufactured following the L18 Taguchi orthogonal array, which was designed by considering three levels of matrix materials, two levels of hybrid reinforcements, and three levels of weight percent of reinforcements. The production of Aluminum Hybrid Metal Matrix Composites (AHMMCs) was conducted using the stir casting process under optimal conditions and subjected to testing for mechanical and physical characterization, including hardness, tensile strength, porosity, and density. These characterizations were examined using the Entropy-VIKOR method to determine the optimum AHMMC. Ultimately, the Entropy-VIKOR optimization outcomes revealed that a 9% silicon carbide with flyash-reinforced AA5083 composite emerged as the optimal AHMMC material concerning its mechanical and physical characteristics. Finally, microstructural studies were carried out on the optimal AHMMC using a Scanning Electron Microscope (SEM) to assess the uniformity of particle distribution in the matrix. The SEM results demonstrated the uniform dispersion of reinforcement particles with no voids.