Semisolid deposition of metallic material by extrusion-base analytical and simulative methodologies

The objective of the paper is the analytical and finite element simulation study of the material behaviour at temperatures of 400 - 450°C of AZ31 and ZM21 magnesium alloys tested for bulk metal working. In the extrusion, representing the main phase of the fused deposition modeling, the metal work material considered was a bulk magnesium alloy billet. The stress and deformation fields are reported in detail using analytical modeling to describe the material in a very small volume of a extruder. It is observed that the increase in the extrusion temperature also determined by the deformation and friction heat produces an increase in the thermal load particularly visible in the high deformed zone. This allows the obtaining of the semisolid condition for the material described by the temperature levels reported by the numerical simulations. Such technology results very useful for ribs deposition over flat surfaces.