Study On The Warm Deep Drawing Behavior Of AZ31/3003Laminated Sheets

Magnesium alloy is the third kind of structural metallic materialdeveloped after the steel and aluminum alloy. As the lightest structural metal inengineering, magnesium alloy has a number of advantages such as low density,high specific strength and high specific stiffness. However, the poorformability at room temperatures and corrosion resistance restrict theapplications of magnesium alloy sheets. Moreover, aluminum alloy has goodcorrosion resistance. With this regard, the magnesium-aluminum compositematerials combine advantages of magnesium alloy and aluminum alloymaterials, so they can be used to produce lightweight products with goodcorrosion resistance and vibration damping property.In this study, the warm deep drawing process of AZ31/3003laminatedsheets was studied both numerically and experimentally, which is meaningfulto the application of magnesium-aluminum composite plate.The microstructure of annealed3003aluminum alloy sheets wereobserved by optical microscope machine and the mechanical properties weremeasured by tensile test at room temperature and cup drawing test. It wasdemonstrated that the plastic deformation ability of3003aluminum alloy sheets had a obvious improvement when the annealing temperature was460℃with the holding time was1hour.Then, the experiments were studied both numerically and experimentallyat the temperature range of110℃230℃by the self-designed die and theeffects of parameters such as stacking sequence, forming temperature,arrangement of rolling direction and thickness of each layer were taken intoconsiderations. Besides, the thickness of each layer for the drawn componentwas measured and the thickness distribution in each layer was analyzed.The results show a good agreement between finite element simulationsand experiments. When the forming temperature was170℃, the limitingdrawing ratio (LDR) of AZ31/3003laminated sheets reached maximum value2.63. It is found that the AZ31/3003laminated sheets exhibited better deepdrawability as the aluminum alloy layer was in contact with the drawing punch.With the increase of total thickness, the maximum drawing load graduallyincreases at same temperature. Considering the thickness distributions ofdrawn cups, the risk fracture position for a drawn cup of laminated sheets wasalso at the punch profile radius, which is similar to that of monolithic sheet. Inaddition, the deep drawing of AZ31/3003laminated sheets reduced the earingheight compared with the drawing of magnesium alloy sheet.