Abstract—An approach, which is based on modified phenomenological models of the rheological behavior of metallic materials under superplasticity conditions, is proposed to describe the grain size distribution during superplastic flow with allowance for grain refinement. The characteristic features of experimental grain size distributions are shown to be successfully simulated.
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The importance of the idea of uniting groups to accelerate calculation in probabilistic models should be noted. According to their algorithm, the groups the strain rate of which having exceeded the critical rate do not disappear and lose part of their volume. In a further calculation, these groups continue to lose volume in each step and create new groups, which leads to explosive growth in the total number of groups if a union algorithm is not used.
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Translated by K. Shakhlevich
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Goncharov, I.A. Simulation of the Grain Refinement in Metals during Superplastic Deformation. Russ. Metall. 2019, 948–955 (2019) doi:10.1134/S0036029519100094
- Keywords: simulation
- microstructural evolution
- grain refinement
- recrystallization models