Multi-Objective Optimization of Stir Casting Parameters using Taguchi-Topsis Methods Krishnan Gopi*, Siva** *Assistant Professor, Department of Mechanical Engineering, Dr. NGP Institute of Technology, Coimbatore, Tamilnadu, India **Professor, Department of Mechanical Engineering, Hindusthan College of Engineering and Technology, Coimbatore, Tamilnadu, India Online published on 2 August, 2016. Abstract Aluminium and its alloys are used in almost every application today ranging from household articles to aerospace due to their useful properties. This paper examines the mechanical strength of Aluminium Matrix hybrid reinforcement composites fabricated by stir casting. Tensile and hardness properties of aluminium alloy (AA7010) reinforced with various combinations of Silicon Carbide and Boron Carbide were investigated. To evaluate the effect of Stir casting process parameters such as stirring time, stirring speed and Reinforcement ratio of Silicon Carbide & Boron Carbide on tensile strength and hardness of the composite, a combination of Taguchi design of L9 Orthogonal array and TOPSIS algorithm is used. Tensile test and Hardness test were carried out for the nine different samples. The optimum parameter combination is obtained by Taguchi design and TOPSIS Algorithm with Stirring Time (T) = 60 seconds, Stirring Speed (S) = 500 rpm and Reinforcement Ratio (R) = 70% SiC& 30% B4C. The impact of the Stir casting parameters on mechanical properties is determined by using analysis of variance (ANOVA). The results from Taguchi design and TOPSIS algorithm show that the mechanical properties are greatly influenced by Stirring Time. Top Keywords Stir Casting, TOPSIS, Multi objective Optimization, Taguchi, Aluminium Matrix Composite, Tensile and Hardness. Top |