Activation and Suppression of < c+a > Dislocations in a Textured Mg-3Al-1Zn Alloy

Dexin Zhao, Xiaolong Ma, S. Picak, I. Karaman, K. Xie
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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.
织构Mg-3Al-1Zn合金< c+a >位错的激活与抑制
在这项工作中,我们统计研究了<的激活和抑制;c +比;变形Mg-3Al-1Zn合金压缩后的位错。我们的结果显示<的激活和抑制;c +比;多晶中的位错主要是由整体织构决定的,而与每个晶粒的晶体取向无关。这一观察结果可以用五个独立滑移系统、降低各向异性和双致应变局部化的要求来解释。这些对<c +比;位错活动为理解多晶镁合金的变形机制提供了关键的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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