Selection of optimal hot extrusion process parameters for AA6061using hybrid MCDM technique

Abstract

Abstract Due to very large strain rates, deformations and temperature changes, selection of optimal hot extrusion process parameters of aluminum alloy composite is aexigent problem in metal processing. Hence in the present work, simulation is performed by varying Cone Half Angle (CHA), billet temperature and friction coefficient at a ram speed of 5mm/s using DEFORM-3D which is FEM simulation software. The effect of change of process parameters were observed with respect to the multiple criteria extrusion load, exit temperature, damage and displacement and the optimal process parameters were selected using a hybrid multiple criteria decision making technique, a combined AHP and TOPSIS approach. AHP is used to prioritize the criteria and the TOPSIS method used to rank the process parameters.