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万迪庆,胡莹琳,利助民,叶舒婷.含二十面体准晶相的铸态Mg-Zn-Y合金阻尼性能的研究[J].稀有金属材料与工程(英文),2019,48(1):71~76.[Wan Diqing,Hu Yinglin,Li Zhumin and Ye Shuting.A Study of Damping Properties of As-Cast Mg-Zn-Y Alloy with I-Phase[J].Rare Metal Materials and Engineering,2019,48(1):71~76.]
A Study of Damping Properties of As-Cast Mg-Zn-Y Alloy with I-Phase
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Received:July 10, 2017  Revised:August 08, 2017
Key words: Mg-Zn-Y alloy  Dendritic Morphology  Quasicrystal phase  Damping properties
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
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Wan Diqing,Hu Yinglin,Li Zhumin and Ye Shuting  
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      Conventional casting method was adopted to fabricate the alloys of Mg-Zn-Y, in which the dendritic morphology and its relation to the damping properties of as-cast Mg-Zn-Y alloy were studied based on the typical Mg93Zn6Y1 alloy containing icosahedral quasicrystal phase. By controlling the pouring temperature, the stirring speed and stirring time, the dendritic morphology with different parameters was obtained. The results show that the microstructure of the as-cast Mg93Zn6Y1 mainly consists of α-Mg dendritic crystal and icosahedral quasicrystal phase. After stirring, the primary α-Mg dendritic gradually have fractal characteristics in faith, and its size changes, affecting the damping capacity. The mechanism was discussed in detail.