Dual Channel Equal Channel Angular Extrusion Of 7003 Aluminum Alloy Texture Research

7003aluminum alloy has good thermal deformation, processing performance and fatigue strength. With the hard aluminum alloy tends to high strength, high tough-ness,and corrosion resistance,how to improve the properties of the materials and up-date potential materials has become the focus of researchers. With the grain refinement, The physical and mechanical properties of the materials will change. Equal channel angular extrusion (ECAP) refine grain with pure shear simple process and low production cost,it has been subjected to colse attention by domestic and foreign research scholars. On the basis of equal channel angular press-ing, Our group raise the double channel equal channel angular extrusion to refine grain and improve the comprehensive mechanical properties of materials.In this study,7003aluminum alloy was compressional deformed by double equal channel angular pressing (D-ECAP) at room temperature for two passes.Three defor-mation stages of D-ECAP were simulated and analyzed by the finite element software of Deform-3D.Network coordinate method’s simulational results and the experimental results are consistent.The microstructure and micro textureo of deformed specimens were analysis by means of SEM.With the pass increasing, aluminum alloy grain obtained the remark-able refinement.The large high grain boundaries decreases quickly, while small angle grain boundaries increase at the same time.During the deforming, the defects in-creases, meanwhile the stess increases, while Kikuchi pattern and image quality has been changed.At room temperateure the deformed specimens were test. Overall, the strength increases, ductility decreasing. After two pass deformation, the yield strength is in-creased from137.3MPa to253.3MPa, tensile strength is increased from190.3MPa to257.6MPa. Elongation decreased from33.08%to19.67%. The fracture is ductile fracture.The micro texture of deformed specimens was tested and analysised by EBSD. Original shape’s textue mainly included cube texture {001}<100>+brass R{111}<112>.After one pass deformation, The sample’s texture were major rotated cube texture {001}<110>+brass R{111}<112>.The texture of samples principallycontained brass texture {112}<111>+texture{112}<132>+R texture {124}<(211> by two pass deformation.The specimens undergoing one pass deformation were annealled at120°C×1h、120°C×21h、200°C×1h, respectively,and discussed the annealing texture of alumi-num alloy.The annealing texture was primary Goss texture {011}<100> at120°C×1h. Passing120°C×X2h treatment, the texture basically involved Goss texture {011}<100>+brass texture {011}<211>+R texture {124}<211> The texture chiefly consisted Goss texture{011}<100>+texture {112}<132> at200°C×1h.Deformation texture of the two pass and annealing texture at120°C×2h have the basically texture. So the materials’ texture changes can be controlled by controlling the process parameters.