EVOLUTION OF THE ORIENTATION OF CROSS SHEAR ROLLING HIGH PURITY ALUMINUM FOILS DURING DEFORMATION AND RECRYSTALLIZATION
高纯铝箔在异步轧制和再结晶过程中取向的演变

Hot rolled high purity aluminum sheet (99.99%) was cold rolled by cross shear rolling with different roll mismatch speed ratios (i=1.06, 1.17, 1.28). The rolled specimens were heated or annealed at different temperatures for different times. Texture distribution and microstructures of specimens were studied by X-ray diffraction technique (ODF analysis) and TEM, respectively. The results showed that the strong rotated cube texture component {100}{011} formed and developed in the cross shear rolling specimen with high roll mismatch speed ratio (i-1.28). During annealing, there is a temperature threshold value for the formation and development of cube texture {001}(100), which is inversely proportional to speed ratio. The cross shear rolling accelerates the recrystallization processes, which is related to deformation stored energy. The easy formation and development of cube texture {001}(100} of high purity aluminum foils after cross shear rolling are analyzed based on theory of deformation and recrystallization.