| Effect of hot extrusion on microstructure and mechanical properties of quasicrystal-reinforced Mg-Zn-Y alloy |
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| 作者姓名： | 郑明毅 乔晓光 徐世伟 甘为民 吴昆 S. Kamado Y. Kojima H. G. Brokmeier |
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| 作者单位： | [1]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China [2]Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka 940-2188, Japan [3]Institute of Materials Engineering, GKSS-Research Center, D21502, Geesthaeht, Germany |
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| 摘 要： | The microstructure and mechanical properties of as-cast and as-extruded Mg-Zn-Y alloy （Mg-11 %Zn- 0.9%Y, mass fraction） containing Mg3 YZn6 quasicrystal were studied. The eutectic icosahedral quasicrystal phase （I-phase） is broken and almost distributes along the extrusion direction, and fine I-phase with nano-size is precipitated during the extrusion. The a-Mg matrix grains are refined due to recrystallization occuring during the hot extrusion. Some {1012} twins are observed in the extruded ZW1101 alloy. And {0002}（1010） fiber texture is formed in matrix alloys after hot extrusion. The extruded alloy exhibits high strength in combination with large elongation at room temperature. The strengthening mechanism of the as-extruded alloy was discussed.
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| 关 键 词： | 镁合金 微结构 热突出 锌 |
| 文章编号： | 1003-6326（2005）04-0715-07 |
| 收稿时间： | 2004-11-28 |
| 修稿时间： | 2005-03-18 |
Effect of hot extrusion on microstructure and mechanical properties of quasicrystal-reinforced Mg-Zn-Y alloy |
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| ZHENG Ming-yi,QIAO Xiao-guang,XU Shi-wei,GAN Wei-min,WU Kun,S.Kamado,Y.Kojima.Effect of hot extrusion on microstructure and mechanical properties of quasicrystal-reinforced Mg-Zn-Y alloy[J].Transactions of Nonferrous Metals Society of China,2005,15(4):715-721. |
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| Authors: | ZHENG Ming-yi QIAO Xiao-guang XU Shi-wei GAN Wei-min WU Kun SKamado YKojima |
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| Abstract: | The microstructure and mechanical properties of as-cast and as-extruded Mg-Zn-Y alloy (Mg-11%Zn0.9%Y, mass fraction) containing Mg3 YZn6 quasicrystal were studied. The eutectic icosahedral quasicrystal phase (I-phase) is broken and almost distributes along the extrusion direction, and fine I-phase with nano-size is precipitated during the extrusion. The α-Mg matrix grains are refined due to recrystallization occuring during the hot extrusion. Some {10-12} twins are observed in the extruded ZW1101 alloy. And {0002} <10-10> fiber texture is formed in matrix alloys after hot extrusion. The extruded alloy exhibits high strength in combination with large elongation at room temperature. The strengthening mechanism of the as-extruded alloy was discussed. |
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| Keywords: | magnesium alloys quasicrystal extrusion microstructure mechanical properties |
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