Task of longitudinal rolling procedure of aluminum sheet under superplasticity conditions


The two-dimensional task of isothermal rolling of aluminum sheet in the superplasticity conditions realized with a low angle of nip is considered. For the mathematical formulation of the task, the theory of elasto-plastic processes ratios of the small curvature was attracted, and the state equation is suitable for the description of regularities of high-temperature deformation in the wide strain rate-rate interval including the conditions of superplasticity effect realization. The specific calculations of the roll force distribution corresponds to thermal superplasticity conditions and outside of its applied to industrial alloy AMg5 was carried out and the results were compared. The experimental realization of the process has been realized in the approximate chemical composition alloy 1561 with the producing fine-grained structure in the rolled product.