Technische Universität Wien
The mechanical properties of aluminum alloys are closely connected to the grain microstructure of the material, which must be carefully controlled during processing. This work deals with tubular parts made of AA2024, which are formed via rotary swaging at room temperature. The recrystallization behaviour of the deformed parts during solution annealing is investigated in an experimental study using light microscopy (LM), scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). The gradual changes in the accumulated strain along the longitudinal axis of the tubes lead to different regions with a wide range of grain sizes after recrystallization. The grain size evolution is simulated using a mean field approach for static recrystallization, as implemented in the software MatCalc. The model can describe the grain size after recrystallization, depending on the position along the longitudinal axis of the tubular parts.
Abstract
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