Magnesium alloy plastic forming and microstructure evolution based on finite element analysis

摘要

This paper studies the compression behaviour of AZ80 magnesium alloy under different deformation conditions of heat. The microstructure of magnesium extrusion deformation and alloy forging in process was simulated, providing the basis for the development and application of AZ80 magnesium alloy plastic forming technology. Friction stir welding parameters of rotating speed and welding speed with different defects and properties of welded was chosen for AZ80 magnesium alloy organization. It has an important influence with the results showed: multiple process can be weld density without defects; the highest parent material tensile strength in 1000r/min speed and 400mm/min welding speed of 90.8%. Through analysis of the joint macro defects, district organization difference, joint micro hardness change trend; fracture location and types of fracture were discussed the formation and mechanical properties of the weld process parameters. The strength of welded joint by a transition region decided its organization source difference big and extrusion textures.