This paper mainly focusses on parametric optimization of squeeze cast AC2A Ni coated composite through Taguchi technique. Composite samples have been cast through squeeze casting for each experimental trial based on L16 orthogonal array. From analysis of variance (ANOVA), it has been found that reinforcement percentage, squeeze pressure, and pressure duration were the casting parameters making significant improvement in the mechanical properties such as hardness and ultimate tensile strength. Reinforcement percentage and squeeze pressure have been identified as the most influencing parameters from the percentage contribution analysis. The optimum parametric setting has been determined through Taguchi technique. It has been confirmed that AC2A-Ni coated composite obtained for the optimum parametric setting has exhibited better mechanical properties compared to the experimental trials. 1. Introduction The increase in demand for light weight and energy efficient materials with high strength, stiffness, and wear resistance leads to the development of advanced materials like metal matrix composites (MMCs) [1–3]. Among the various matrix materials available, aluminium alloys are mostly employed in MMCs because of their light weight, economical viability, processing flexibility, corrosion resistance, high thermal conductivity, and heat treatment capability [4–6]. Particle reinforced aluminium metal matrix composites (PAMMCs) are the most attractive materials due to their improved strength, high modulus, and more resistance against wear and corrosion when compared to their monolithic alloy [7]. Even though specific strength of PAMMCs is not as high as that of continuous fiber reinforced MMCs, ease of processing, isotropic properties, and considerable cost make them potential candidates in various applications like aerospace, marine, military, and automobile [7, 8]. Moreover, the particle reinforcements reduce the troubles allied with manufacturing of continuous fiber reinforced MMCs such as fiber mismatch, fiber fracture, and heterogeneity in microstructure [9]. Oxides, carbides, nitrides, and borides are the various groups of ceramic reinforcements used in PAMMCs [10]. In the various groups, silicon carbide finds more application due to its low cost and easy availability [11]. In addition, SiC have been found to have excellent compatibility with the aluminium alloy matrix [12, 13]. MMCs are usually processed either by solid state processes (powder metallurgy) or liquid state processes (casting route) [14, 15]. In the former, distribution of the particle
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