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Effect of hot extrusion on microstructure and mechanical properties of quasicrystal-reinforced Mg-Zn-Yalloy

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【作者】郑明毅；乔晓光；徐世伟；甘为民；吴昆； S.Kamado； Y.Kojima； H.G.Brokmeier；

【Author】 ZHENG Ming-yi~1, QIAO Xiao-guang~1, XU Shi-wei~1, GAN Wei-min~1, WU Kun~1, S.Kamado~2, Y.Kojima~2, H.G.Brokmeier~3(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, Geesthacht, Germany)

【机构】 School of Materials Scienceand Engineering； Harbin Institute of Technology； Department of Mechanical Engineering； Nagaoka University of Technology； Institute of Materials Engineering； GKSS-Research Center Harbin 150001； China； Harbin 150001； Nagaoka 940-2188； Japan； D21502； Geesthacht； Germany；

【Abstract】 The microstructure and mechanical properties of as-cast and as-extruded Mg-Zn-Y alloy （Mg-11%Zn-0.9%Y, mass fraction） containing Mg₃YZn₆ 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 {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.更多还原

【关键词】 magnesium alloys； quasicrystal； extrusion； microstructure； mechanical properties；
【Key words】 magnesium alloys； quasicrystal； extrusion； microstructure； mechanical properties；

【基金】 Project(50201005)supportedbytheNationalNaturalScienceFoundationofChina

【文献出处】 Transactions of Nonferrous Metals Society of China ,中国有色金属学会会刊(英文版) , 编辑部邮箱 ,2005年04期

【分类号】TG376.2
【被引频次】9
【下载频次】114

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