Finite element simulation and experiment for extrusion of semi-solid Al 2024

It is the objective of this study to analyze the effect of various process variables on the quality of extruded product and extrusion force for semi-solid extrusion of Al 2024 with solid phase structure of globular type by the finite element method. Process variables considered in the present study are initial solid fraction, ram speed, semi-angle of die and reduction in area. The FE-simulation code used in this study has been updated from the previous developed code. The flow and deformation of the semi-solid alloy are analyzed by coupling the deformation of the porous skeleton and the flow of liquid phase using Darcy's law. It is assumed that the initial solid fraction is homogeneous. The results of the experiment are compared with those of simulation in order to verify the usefulness of the developed FE-simulation code.