The static recrystallization process of a cold-rolled Mg-Zn-Gd alloy was tracked by a quasi-in-situ electron backscatter diffraction method to investigate the orientations of nuclei. The results show that orientation distribution of nuclei is associated with nucleation mechanism. The continuous static recrystallization nuclei display similar orientations to the parent grains with TD orientation. Differently, discontinuous static recrystallization nuclei formed within the parent grains (TD-45° orientation) show random orientations and a variety of misorientation angles but preferred axes <$\overline{52}$73> or <$\overline{52}$70>. Interestingly, a special oriented nucleation is found. Discontinuous static recrystallization nuclei originated from boundaries of the parent grain (TD-70° orientation) show concentrated TD orientations in another side due to the preferred misorientation relationship 70° <$11\overline{2}$0> (∑18b). It is speculated that these two special misorientation relationships are related to the dislocation type.

利用准原位电子背散射衍射方法跟踪了冷轧Mg-Zn-Gd合金的静态再结晶过程，以研究核的取向。结果表明，核的取向分布与成核机理有关。连续的静态再结晶核显示出与具有TD取向的母粒相似的取向。不同的是，在母体晶粒内形成的不连续静态再结晶核（TD-45°取向）表现出无规取向和各种取向错误角，但优选轴<$\overline{52}$73>或<$\overline{52}$70>。有趣的是，发现了一种特殊的取向成核。源于母粒边界（TD-70°取向）的不连续静态再结晶核由于优选的70°<失取向关系而在另一侧集中显示TD取向。$11\overline{2}$0>（∑18b）。推测这两种特殊的取向错误关系与位错类型有关。