Publication

Abstract : In this work ABAQUS/Explicit FE package is used to create a numerical model replicating Bimetallic extrusion process of Ti-6Al-4V and AZ31B alloys. A detailed FE model was developed and validated by comparing the results with an existing literature. Response Surface methodology (RSM) was used to formulate the objective function and obtain optimum extrusion parameters, in DoE software. The influence of each extrusion parameters on extrusion force was studied with the help of ANOVA and significance and contribution of each parameter were identified. From ANOVA, it is concluded that billet height, die angle and co efficient of friction are the most significant parameters influencing extrusion force. Also, from the study it was found that extrusion force increases with increase in billet height, die angle and coefficient of friction. and decreases with increase in ramp speed, core diameter and initial billet temperature. Finally, simulation was run using the optimized extrusion parameters and extrusion force obtained from the simulation was compared with the predicted value. The error percentage was found to be less than 1%.