Abstract
Various characteristic structures in typical magnesium alloys, including dislocation cells, substructures and twins, have an important influence on the dynamic recrystallization behavior, and the DRX (dynamic recrystallization) behavior is closely related to the grain refinement and texture weakening of the hot deformed structure. Therefore, this study reveals the influence of the above characteristic structures on the dynamic recrystallization behavior of magnesium alloys, which have great significance for regulating the high-performance hot deformed microstructure of magnesium alloys and optimizing the macro mechanical properties. In this study, continuous variable channel direct extrusion (CVCDE) magnesium alloy was prepared by CVCDE, and its macro mechanical properties including hardness and uniaxial tension were characterized. The thermoplastic deformation behavior and texture evolution of magnesium alloy with characteristic structure were analyzed by electron back-scattering diffraction technology. It is found that the dislocation recombination was realized by deformation mechanism (slip, climb and cross slip), the formation of grain substructure in coarse grains and the induction of recrystallization by twins promote the recrystallization behavior in hot deformed structures more adequate, which effectively improves the degree of microstructure refinement and deformation uniformity.
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This work was financially supported by the Natural Science Foundation of Heilongjiang Province (JQ2022E004).
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Bian, N., Li, F., Niu, W. et al. Dual Strengthened Control of Recrystallization Behavior on CVCDE Magnesium Alloy Containing Characteristic Structure. Acta Metall. Sin. (Engl. Lett.) 36, 1805–1821 (2023). https://doi.org/10.1007/s40195-023-01594-9
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DOI: https://doi.org/10.1007/s40195-023-01594-9