Numerical Simulation Study of the Extrusion Process of AZ91D Magnesium Alloy Bar

The stress-stain curves of AZ91D magnesium alloy were gained through Gleeble-1500D simulator.The rigid plastic finite element method was used for the couple thermal-mechanical numerical simulation of the rods and bars extrusion process of AZ91D alloy.The effects of deformation temperature and extrusion velocity on the deformation force and strain-effective were discussed.The simulation results show that the extrusion temperature is 400 ℃ and the extrusion speed is 12.5 mm/s under the extrusion ratio 25∶1 of AZ91D magnesium alloy.