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Aluminum has a low density , high specific strength , good corrosion resistance and low cost series of advantages in aviation, aerospace, automotive and other industries have broad application prospects and irreplaceable position . With the emergence of a worldwide energy crisis and the growing , high-strength aluminum alloy used in aircraft, automobiles to reduce fuel consumption rate , saving energy has become a trend . However , due to the relatively poor ductility of high strength aluminum alloy material , hot forming an effective way to solve the problem , study its thermal forming processes has important engineering value . Depth study thermal formability for Southwest Aluminum first domestic deep red 6016/6181 T4 high strength aluminum alloy plate , the main contents are as follows : 1 . Thermal formability of the two aluminum alloy , get two mechanical and thermal state of the kind of material formability parameters , constitutive relations , and internal microstructure of materials analysis study two materials of different temperatures . 2 changes according to the strain path principle , the design of thermal forming limit of the test apparatus , the combination method using single pull-up and double-pull ( flatulence ) , respectively, to study the forming limit of the two materials at the respective temperatures . At different process conditions , the aluminum alloy plate simultaneous cooling hot forming process for a preliminary study and analysis of the microstructure of the material reinforced variation . Through the above study , the results are as follows : 1 according to the mechanical and thermal state formability parameters determine the 6016/6181 T4 two materials Hollomon constitutive equation , provided the material basis for the future of the finite element numerical simulation . Get forming limit diagram of the two materials under various temperature, strain path , the instability criterion for future finite element simulation . Preliminary strengthening rule of the aluminum alloy under the process conditions in the simultaneous cooling thermoforming . Under certain process conditions , this process is feasible, to provide a reference for subsequent development studies .
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