Formation of <0001>-rotation-type kink boundary in Mg-Zn-Y alloy with long-period stacking ordered structure

Michiaki Yamasaki; Tsuyoshi Mayama; Tsubasa Matsumoto; Koji Hagihara; Daria Drozdenko; Yoshihito Kawamura

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Formation of <0001>-rotation-type kink boundary in Mg-Zn-Y alloy with long-period stacking ordered structure

机译：Mg-Zn-Y合金中的长周期堆叠结构形成+ 0001> - 型扭曲边界

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The dislocation configuration around the <0001>-rotation-type kink bands/boundaries formed in extruded Mg_(89)Zn_4Y_7 alloys with a long-period stacking ordered structure was investigated by an intragranular misori-entation axis analysis and a g·b study. The g·b analysis suggests that the <0001>-rotation-type kink boundary with small tilt angles comprises prismatic edge dislocations. The tendency of kinking with lattice rotation around the <0001> axis to activate at temperatures higher than 673 K can be explained by the temperature dependence of the critical resolved shear stress of prismatic slips. The kink bands arising from the activation of the prismatic slip system are numerically reproduced by a crystal plasticity finite element analysis. Geometrical softening should be significant despite kink-band formation stimulated by the prismatic slip system.

机译：通过腔内误导性轴分析和G·B研究研究了在挤出的MG_（89）Zn_4Y_7合金中形成的挤出的MG_（89）Zn_4Y_7合金中形成的<0001>的Zn_4Y_7合金围绕的脱位配置。 G·B分析表明，具有小倾斜角度的<0001>型扭结边界包括棱柱形的边缘位错。通过棱镜分辨剪切应力的棱镜剖分剪切应力的临界分辨剪切应力的温度依赖性，通过围绕高于673k激活的晶格旋转的扭曲旋转的趋势可以解释。由棱镜增强系统的激活引起的扭结带进行了用晶体可塑性有限元分析来计算。尽管由棱镜滑动系统刺激的扭结带形成，但几何软化应该是重要的。

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来源
 《Materials Science and Engineering》 |2021年第5期|141466.1-141466.17|共17页
作者
Michiaki Yamasaki; Tsuyoshi Mayama; Tsubasa Matsumoto; Koji Hagihara; Daria Drozdenko; Yoshihito Kawamura;
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作者单位

Department of Materials Science Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan Magnesium Research Center Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan;

Department of Materials Science Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan Magnesium Research Center Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan;

Department of Materials Science Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan;

Department of Physical Science and Engineering Nagoya Institute of Technology Gokiso Nagoya 466-8555 Japan;

Department of Physics of Materials Faculty of Mathematics and Physics Charles University Ke Karlovu 5 Prague 2 12116 Czech Republic The Czech Academy of Sciences Nuclear Physics Institute Hlavni 130 250 68 Rez Czech Republic;

Magnesium Research Center Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan;

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正文语种 eng
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关键词
Magnesium alloy; Long-period stacking ordered phase; Kink deformation; Geometrically necessary dislocation; Intragranular misorientation axis analysis; Crystal plasticity finite element method;

机译：镁合金;长期堆叠有序阶段;扭结变形;几何必要的错位;intragranular错位轴分析;晶体塑性有限元法;

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Formation of <0001>-rotation-type kink boundary in Mg-Zn-Y alloy with long-period stacking ordered structure

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