KITAEVA Daria Saint Petersburg State Polytechnical University

Spoluautoři RUDAEV Yakov, SUBBOTINA Elena

The problem of creation of technological approaches to research of processes of volume forming of industrial aluminum alloys on the basis of managed superplasticity deformation is considered. The research is carried out within the dynamic model which with use of equations the elasto-plastic processes of small curvature is generalized on a spatial case. Isothermal conditions in the temperature ranges of superplasticity allow to consider responsibility for the process in the field of the deformation rate. The received rate restrictions open opportunity thus to allocate and mathematically to limit area in the center of plastic deformation in which the effect of superplasticity is realized. This area in which in the course of dynamic recrystallization the ultrafine-grained structure was created, borders on zones of thermoplasticity and high-temperature creep. So there is solved the problem – to manage in the course of heating and deformation by the grain size. Therefore, the main problem of creation of mathematical model of process of forming is the definition and the solution of the corresponding regional task. Need to maximize the volume of a zone of superplasticity at an optimum combination of power power, thermal and kinematic conditions and, naturally, to predict receiving details with ultrafine-grained structure appears the general here. Analytical research of the forming process of a thin-sheet aluminum semi-finished product is given as an example from an alloy 1561.

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