Two different kinds of hot compressions, namely normal-compression and can-compression, were performed on the Mg–11Gd–4Y–2Zn–0.5Zr alloy, featured with long period stacking ordered (LPSO) phase. The kinking behavior of LPSO phase and microstructure evolution was investigated to clarify the effect of levels of imposed hydrostatic pressure. The results suggest that the LPSO phases including both the intragranular 14H-LPSO phase and intergranular 18R-LPSO phase suffer severe kinking behavior under higher hydrostatic pressure induced by can-compression, which is firstly characterized with more kinking times and smaller relative kinking width. The main reason for such enhanced LPSO kinking during can-compression may be mainly ascribed to the higher dislocation density under a higher level of hydrostatic pressure. Meanwhile, a competitive relationship between the kink behaviors of intergranular 18R-LPSO phase and intragranular 14H-LPSO phase was observed. That is, the intergranular 18R-LPSO phase only kinks obviously on the condition that the surrounded intragranular 14H-LPSO phase scarcely kinks. In contrast to the distinctive kinking of LPSO phase, the dynamic recrystallization (DRX) mechanism shows less dependence on the hydrostatic pressure. Resultantly, similar DRX fractions and crystallographic texture were attained for two compression processes owing to the similar operation of deformation mode.

对Mg–11Gd–4Y–2Zn–0.5Zr合金进行了两种不同的热压缩，即常压缩和罐压缩，其具有长期堆积有序（LPSO）相。研究了LPSO相的扭结行为和微观结构演变，以阐明施加的静水压力水平的影响。结果表明，颗粒内14H-LPSO相和颗粒间18R-LPSO相同时存在的LPSO相在罐头压缩引起的较高静水压下会发生严重的扭结行为，其首先具有更长的扭结时间和较小的相对扭结宽度。这种在罐压缩过程中增加LPSO扭结的主要原因可能归因于在较高静水压力下较高的位错密度。与此同时，观察到晶间18R-LPSO相和晶内14H-LPSO相的扭折行为之间存在竞争关系。也就是说，在包围的颗粒内14H-LPSO相几乎不弯曲的情况下，颗粒间18R-LPSO相仅明显弯曲。与LPSO相的独特扭结相反，动态重结晶（DRX）机理对静水压力的依赖性较小。结果，由于变形模式的相似操作，两个压缩过程获得了相似的DRX分数和晶体学织构。与LPSO相的独特扭结相比，动态重结晶（DRX）机理对静水压力的依赖性较小。结果，由于变形模式的相似操作，两个压缩过程获得了相似的DRX分数和晶体学织构。与LPSO相的独特扭结相反，动态重结晶（DRX）机理对静水压力的依赖性较小。结果，由于变形模式的相似操作，两个压缩过程获得了相似的DRX分数和晶体学织构。