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Effect of Zn on Microstructures and Mechanical Properties of Mg-25Sn Alloys
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Key Laboratory of Solidification Control and Digital Preparation Technology Liaoning Province,Dalian University of Technology

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    Abstract:

    Mg-25Sn-xZn alloys were prepared by mechanical alloying and hot-press sintering methods using Mg powders, Sn powders and Zn powders as raw materials. The effects of the Zn content on microstructures and mechanical properties of the Mg-25Sn alloys were studied. The results show that Zn didn"t participate with the alloying reaction in the mechanical alloy process of Mg-25Sn-xZn system, but the introduction of Zn reduced the size of Mg+Mg2Sn mixture. The Zn in the sintered Mg-25Sn-xZn was completely transformed into MgZn2 phase except the solution. And with the increase of the Zn content, the size of MgZn2 phase gradually increased. MgZn2 phase was preferentially distributed along Mg grain boundary and around Mg2Sn particle phase. When the Zn addition is 6wt%, the Mg-25Sn alloy exhibited excellent mechanical properties, hardness, yield strength, fracture strength and strain are 1.60GPa, 388MPa, 497MPa and 7.5% respectively.

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[Wang Rong, Fang Canfeng, Xu Zunyan, Wang Yinyang, Zhong Chongyu. Effect of Zn on Microstructures and Mechanical Properties of Mg-25Sn Alloys[J]. Rare Metal Materials and Engineering,2021,50(3):1032~1036.]
DOI:10.12442/j. issn.1002-185X.20200332

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History
  • Received:May 16,2020
  • Revised:June 27,2020
  • Adopted:July 01,2020
  • Online: April 02,2021
  • Published: