Abstract Investigating recrystallization is essential to optimize the microstructure including texture weakening and grain refinement in the rolling of magnesium alloys, thus to improve the mechanical properties of magnesium sheets for industrial applications. This research has gained an in-depth understanding of the effects of deformation bands and twin-twin interactions on recrystallization, which will potentially lead to improved manufacturing processes and mechanical properties of magnesium alloys. To study their individual effects, the recrystallization mechanisms of the room-temperature (RT)-rolled and liquid-nitrogen-temperature (LNT)-rolled samples during the annealing process were analysed with the quasi-in-situ electron backscatter diffraction method, respectively. It is found that recrystallization mainly occurred in deformation bands in the RT-rolled sample, which enhanced the initially formed texture, due to oriented and inhomogeneous grain growth. However, it is of great interest to see that the recrystallized sites were mainly located around the (10 1 ¯ 2)-(01 1 ¯ 2) twin-twin interactions with high kernel average misorientation (KAM) values in the LNT-rolled samples, resulting in rather weaker texture, finer grain size and more homogeneous microstructure, because of the randomized orientations of recrystallized grains and uniform grain growth, while almost no recrystallization was observed around the single tension twin variant.

中文翻译：

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双孪晶相互作用和变形带对AZ31镁合金再结晶形核的影响

摘要 研究再结晶对于优化镁合金轧制过程中的显微组织，包括弱化和晶粒细化，从而提高工业应用镁板的机械性能至关重要。这项研究深入了解了变形带和孪晶相互作用对再结晶的影响，这将有可能改进镁合金的制造工艺和机械性能。为了研究它们各自的影响，分别采用准原位电子背散射衍射方法分析了室温 (RT) 轧制和液氮 (LNT) 轧制样品在退火过程中的再结晶机制。 . 发现再结晶主要发生在 RT 轧制样品的变形带中，由于取向和不均匀的晶粒生长，这增强了最初形成的织构。然而，在 LNT 轧制样品中，再结晶位点主要位于 (10 1 ¯ 2)-(01 1 ¯ 2) 双孪晶相互作用附近，具有高内核平均取向差 (KAM) 值，这一点非常有趣。 ，由于再结晶晶粒的随机取向和均匀的晶粒生长，导致相当弱的织构、更细的晶粒尺寸和更均匀的微观结构，而在单张力孪晶变体周围几乎没有观察到再结晶。