Abstract
The plastic deformation macrolocalization parameters are compared to the Hall-Petch relation parameters for the flow stress in polycrystalline aluminum specimens with a grain size of 8 × 10−3−5 mm. Two branches in the dependence of the localized plastic deformation autowave length on the grain size and two versions of Hall-Petch hardening are found in this grain size range. The boundary between the versions of the dependences corresponds to db = 0.1 mm for both cases. The correspondence between localized plastic flow patterns and the Hall-Petch relation is studied.
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