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Effects of rapid solidification on the microstructural evolution, mechanical properties and corrosion behavior of Mg-4Al-2Zn alloys with various Y addition
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School of Materials Science and Engineering, Hebei University of Technology

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TG146.2

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    Abstract:

    In present work, two kinds of Mg-4Al-2Zn alloy (AZ42) with minor addition of Y elements (0.5, 1.0 wt.%) were succesfully fabricated by gravity casting and rapid solidifaication process, respectively. In addition, microstructure, mechanical properties and corrosion behavior of AZ42 alloys with Y addition were systemetically investigated. The results show that rapid solidification technique can significantly refine the microstructure of AZ42 alloys containing Y and improve related mechanical properties and corrosion resistance compared with the traditional casting counterparts. The microstructure of Y-bearing AZ42 alloy is mainly composed of α-Mg matrix, β-Mg17Al12 phase and Al2Y phase. Moreover, the addition of Y in AZ42 alloy resulted in grain refinmenent and enhancement of both mechancial and corroison properties, which maybe attributed to fine grain size and distribution modification of β-phase. And the optimum amount of Y element in AZ42 alloy is determined to be 0.5 wt.%.

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[Li Qizhi, Yu Hui, Wang Zhifeng, Wang Yuechen, Meng Shuaiju, Xiao Haitao, Zhao Weimin. Effects of rapid solidification on the microstructural evolution, mechanical properties and corrosion behavior of Mg-4Al-2Zn alloys with various Y addition[J]. Rare Metal Materials and Engineering,2019,48(3):1001~1007.]
DOI:10.12442/j. issn.1002-185X.20170758

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History
  • Received:August 25,2017
  • Revised:October 18,2017
  • Adopted:November 09,2017
  • Online: April 10,2019
  • Published: