Development of a visco-plastic constitutive modeling for thixoforming of AA6061 in semi-solid state

Abstract

A visco-plastic constitutive equation for thixoforming is proposed that takes into account the effect of the liquid fraction along with other factors i.e. strain rate and temperature. The incorporation of liquid fraction allows the model to be applied to any type of semi-solid aluminum alloys is a significant improvement over the previous empirical models. Based on the thixotropic compression tests for the semi-solid AA6061 aluminum alloy, this visco-plastic constitutive model is validated by means of simulation on the ABAQUS platform.