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The recrystallization behaviour of a twin roll cast ZAX210 alloy has been investigated under deformation conditions equivalent to the hot rolling process of magnesium strip. A set of strain levels, beginning at the critical strain for the onset of dynamic recrystallization has been studied. The dynamic recrystallization taking place during hot deformation of the magnesium alloy ZAX210 was analysed by plane strain compression tests together with optical microstructure investigation. The volume fraction and size of dynamically recrystallized grains increased with increasing strain. With equal strain the dynamically recrystallized volume fraction rises with higher deformation temperatures as well as lower strain rates. Furthermore, it has been found that the deformation temperature plays a major role, rather than the strain rates, in the activation of dynamic recrystallization processes during deformation. The results were used to identify the coefficients for the JMAK-model approach on the dynamic recrystallization of the ZAX210 twin roll cast strip.
Keywords: Dynamic recrystallization, magnesium alloy, calcium, Mg-Zn-Al-Ca alloy, twin roll casting, plain strain compression test© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.