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《中国有色金属学报(英文版)》 2014-05
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Effect of Y addition on microstructure and mechanical properties of Mg-Zn-Mn alloy

Fu-gang QI;Ding-fei ZHANG;Xiao-hua ZHANG;Fu-sheng PAN;Science and Technology on Surface Physics and Chemistry Laboratory,China Academy of Engineering Physics;College of Materials Science and Engineering, Chongqing University;  
The effects of Y on the microstructure and mechanical properties of Mg-6Zn-1Mn alloy were investigated. The results show that the addition of Y has significant effect on the phase composition, microstructure and mechanical properties of Mg-6Zn-1Mn alloy. Varied phases compositions, including Mg7Zn3, I-phase(Mg3YZn6), W-phase(Mg3Y2Zn3) and X-phase(Mg12YZn), are obtained by adjusting the Zn to Y mass ratio. Mn element exists as the fine Mn particles, which are well distributed in the alloy. Thermal analysis and microstructure observation reveal that the phase stability follows the trend of XWIMg7Zn3. In addition, Y can improve the mechanical properties of Mg-Zn-Mn alloy significantly, and the alloy with Y content of 6.09% has the best mechanical properties. The high strength is mainly due to the strengthening by the grain size refinement, dispersion strengthening by fine Mn particles, and introduction of the Mg-Zn-Y ternary phases.
【Fund】: Project(2007CB613700)supported by the National Basic Research Program of China;; Project(2011BAE22B01-3)supported by the National Key Technologies R&D Program of China;; Project(2010DFR50010 2008DFR50040)supported by the International Scientific and Technological Cooperation Program of Ministry of Science and Technology of China;; Project(CSTC 2010AA4048)supported by Chongqing Science and Technology Commission China
【CateGory Index】: TG146.22
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