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Impact of grain boundaries on microstructure evolution during deformation of a magnesium tricrystal

机译：三晶镁变形过程中晶界对组织演变的影响

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摘要

The deformation behavior of specially grown magnesium tricrystals was studied, where two of the grains were chosen to primarily exhibit prismatic slip, while the third grain was oriented for tension twinning. In all three grains basal slip was initially suppressed. Identical tricrystalline samples with grain boundaries and the triple line aligned parallel to the direction of loading were deformed by plane strain compression at 370 degrees C up to select strains. The mechanical response and microstructure evolution in the deformed tricrystals were comprehensively characterized and analyzed with a particular focus on the role of grain boundaries for deformation twinning, dislocation slip activity and dynamic recrystallization.
机译：研究了特殊生长的镁三晶体的变形行为，其中选择了两个晶粒主要表现出棱柱滑移，而选择了第三个晶粒进行张力孪晶取向。在所有这三种谷物中，基底滑移最初都被抑制。具有相同晶界和平行于加载方向排列的三重线的相​​同三晶样品通过在370摄氏度下的平面应变压缩变形，以选择应变。全面表征和分析了变形三晶体的力学响应和微观结构演变，特别关注晶界对变形孪晶，位错滑移活性和动态再结晶的作用。

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