Severe Plastic Deformation Of 5083 Aluminum Alloy Sheet By Alternate Ring-Wave Deep Drawing And Finite Element Simulation

Severe plastic deformation(SPD)is one of the effective methods to prepare the fine crystal plate and optimize the properties of the sheet.It can effectively refine the grain size of the material and improve the physical and mechanical properties of the material to a great extent,especially for the plastic processing of the refractory material.In this paper,combined with the advantages and disadvantages of the existing rigid plastic deformation process,the ring wave repeated drawing process was innovatively proposed,the fine grain treatment of 5083 aluminum alloy sheet was carried out,and the variation law of the equivalent stress and strain at each stage of strong deformation was studied by the finite element simulation,and the mechanical properties and microstructure of the material after the deformation were tested.Three process routes are proposed,namely,double set die ring wave repeating drawing + intermediate flatting process,single set die ring wave repeating drawing + intermediate flatting process and double sleeve ring wave repeating drawing process.The relevant process parameters were calculated,and the dies used in different processes were designed.The tensile test of the original 5083 aluminum alloy sheet at room temperature was carried out,and the stress and strain related data were obtained,and the mechanical properties of 5083 Al alloy,such as yield strength,tensile strength and fracture elongation,were obtained.The fracture morphology of the tensile specimen was observed under the scanning electron microscope and the fracture type was analyzed.The data support was provided for the finite element simulation and the design of the waveform parameters of the ring wave die.The MSC.Marc finite element software is used to simulate the cyclic wave drawing process,and the distribution law of the equivalent stress,strain and three direction stress of each deformed channel is analyzed.The deformation area is divided into three regions.The stress and strain accumulation rules and their homogeneity in the main deformation area are mainly analyzed.The deformation process of 5083 aluminum alloy sheet by ring wave repeated drawing is experimentally studied,and fine-grained 5083 aluminum alloy sheet is prepared.The mechanical properties,microstructure,microhardness and texture of the materials prepared by different process routes are tested,and the grain effects of different processes are analyzed and compared.The optimum process for preparing fine grain with excellent surface quality and excellent performance is obtained by comparing the strain distribution with the finite element simulation.The microstructure of fine crystal 5083 aluminum alloy sheet,which is prepared by repeated ring wave stretching and strong deformation process,is even more fine and uniform,and the mechanical properties are better.It has a wide application prospect in the field of lightweight aluminum alloy sheet.