Research On Formability Of Rolling Of AZ80 Mg Alloy Based On Numerical Simulation Optimization

As the lightest structural metal material,magnesium alloy has both excellent comprehensive mechanical properties and physical and chemical properties.It has outstanding advantages and application prospects in the fields of aerospace,transportation engineering and electronic communications that are in urgent need of lightweight.Magnesium alloy sheet is widely used as a raw material for secondary forming in actual production.Its performance directly determines the performance and production efficiency.However,magnesium alloy has poor plastic deformation ability due to its inherent close-packed hexagonal structure.So It is of great significance to develop reasonable rolling processes and rolling methods to prepare plates with excellent performance.This paper uses Deform-3D software to perform a large number of numerical simulations on the extrusion and rolling process of AZ80 magnesium alloy to study the effects of extrusion temperature,rolling process parameters and rolling methods on the temperature field,stress field,strain field etc.Through the finite element to improve the forming performance of AZ80 magnesium alloy in the actual process.Analyze high temperature rheological behavior and construct constitutive equations through AZ80 thermal compression curve.By analyzing the results of numerical simulation of extrusion,it was found the temperature rise of the blank during the deformation process decreases as the extrusion temperature rising.According to the results of the simulation,magnesium alloy bars were prepared through extrusion experiments.The forming performance of the bars at 350?and 400?extrusion temperature was the best.The optimal rolling speed was determined to be 5m/min and the optimal singlepass rolling reduction was 30%.The distribution of equivalent stress and equivalent strain is more uniform at 350?and 400?.It is found that cross rolling can effectively reduce anisotropy,and cross rolling at 400 ? is more conducive to reducing anisotropy.According to the results of rolling simulation,magnesium alloy sheets with good surface quality were prepared through rolling experiments.