
The mathematical model, which has been developed on the basis of the dislocation kinetic equations and allows describing and analysing the strength characteristics of metals and alloys, is presented in the work. The equations of dislocation density evolution in Al 1570 alloy have been set up, taking into account its state and structure pequliarities, developed in the result of severe plastic deformation. The dependencies of the conventional yield strength from the grain size in Hall-Petch coordinates and the rate of the dynamic recovery processes from the grain size have been calculated.
В работе представлена развитая на основе уравнений дислокационной кинетики математическая модель, позволяющая описывать и анализировать прочностные характеристики металлов и сплавов. Составлены уравнения эволюции плотности дислокаций в сплаве Al 1570 с учетом его состояния и структурных особенностей, сформированных в результате интенсивной пластической деформации. Рассчитаны зависимости условного предела текучести от размера зерен в координатах Холла-Петча, а также интенсивности процессов динамического возврата от размера зерен.
УЛЬТРАМЕЛКОЗЕРНИСТЫЕ МАТЕРИАЛЫ, ЗАКОН ХОЛЛА-ПЕТЧА, МОДЕЛИРОВАНИЕ ДЕФОРМАЦИОННОГО ПОВЕДЕНИЯ
УЛЬТРАМЕЛКОЗЕРНИСТЫЕ МАТЕРИАЛЫ, ЗАКОН ХОЛЛА-ПЕТЧА, МОДЕЛИРОВАНИЕ ДЕФОРМАЦИОННОГО ПОВЕДЕНИЯ
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