Abstract In this work, we statistically studied the activation and suppression of 〈c + a〉 dislocations in a textured Mg–3Al–1Zn alloy after compression. Our results revealed that the activation and suppression of 〈c + a〉 dislocations in polycrystals are primarily governed by the overall texture, regardless of the crystallographic orientation of each grain. This observation is explained by the requirement of five independent slip systems, reduced anisotropy, and twin-induced strain localization. These direct observations of 〈c + a〉 dislocation activities offer a key insight into understanding the deformation mechanism of polycrystalline Mg alloys.

中文翻译：

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织构 Mg-3Al-1Zn 合金中〈c + a〉位错的活化和抑制

摘要 在这项工作中，我们统计研究了压缩后织构的 Mg-3Al-1Zn 合金中 <c + a> 位错的激活和抑制。我们的结果表明，多晶中<c + a> 位错的激活和抑制主要受整体织构控制，而与每个晶粒的晶体取向无关。这一观察结果可以通过需要五个独立的滑移系统、减少的各向异性和双诱导应变局部化来解释。这些对<c + a> 位错活动的直接观察为理解多晶镁合金的变形机制提供了关键见解。