Study On Optimization Of 5083 Aluminum Alloy Forging Process Based On Physical And Numerical Simulation

5083 aluminum alloy is widely used in the pipeline,shipbuilding,mold manufacturing and other industries because of its good mechanical properties,mechanical processing performance and excellent corrosion resistance.The 5083 cast Aluminum Alloy one-way isothermal compression experiment,reveals its rheological behavior at high temperature.The stress-strain curve was modified by the friction correction formula and then the constitutive equation and the processing maps were solved.The softening mechanism and microstructure evolution of the alloy after deformation were analyzed by optical microscopy and transmission electron microscopy.The forging process of 5083 aluminum alloy flange was simulated by DEFORM software and the forging process was optimized.The main research results are as follows:?1?In one-way isothermal compression process,flow stress of 5083 Aluminum Alloy quickly to the peak in the early stages of deformation,with the dynamic recovery and dynamic recrystallization occur,tends to be steady,has obvious steady rheological characteristics and dynamic softening trend.With the increase of the deformation temperature and the decrease of the strain rate,the peak stress and peak strain of the alloy decrease gradually.?2?The stress and strain curves were modified by the friction correction formula proposed by Ebrahimi and R.The influence of friction force on the flow stress was obvious at various temperatures and strain rates,and increased with the increase of the true strain;Describe the process of influence of temperature and strain rate on flow stress in the thermal compression deformation with the parameters of Zener-Hollomon equation,the thermal deformation activation energy of 5083 aluminum alloy was calculated to be 164.17kJ/mol.?3?Drawing processing maps based on dynamic material model,obtained the appropriate thermal deformation parameters of 5083 aluminum alloy:the deformation temperature is 400⁵00?,the strain rate is 0.01⁰.1s^-1 or the deformation temperature is 340⁴50?,and the strain rate is 0.001⁰.01s^-1.?4?5083 Aluminum Alloy hot compression process,obvious work hardening then softening,deformation rate and decrease with increasing deformation temperature,reduction of dislocation density,sub grain and gradually grew up,the main softening mechanism by dynamic recovery into dynamic recrystallization.?5?Based on the constitutive equation,processing map,microstructure evolution and DEFORM-3D,the optimum forging parameters of 5083 high neck flange are obtained.