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Microstructure Evolution and Mechanical Behavior of Mg-10Y-2.45Zn-1Ca-0.37Al Alloy
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1.Taiyuan University of Technology;2.Shanxi Province Technology Market Management Office Shanxi Taiyuan

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    Abstract:

    Mg-10Y-2.45Znand Mg-10Y-2.45Zn-1Ca-0.37Al alloys were fabricated by magnetic levitation induction smelting coupled with copper-mould suction casting technique. The compound effect of high content Ca and small amount of Al alloying element addition on the formation of LPSO phase in as-cast Mg-10Y-2.45Zn alloy and the microstructure evolution and mechanical behavior under high temperature and high stress were investigated. The results showed that high content of Ca and a small amount of Al were involved in the formation of massive 18R LPSO and a large number of 18R LPSO phase delamination interface emerged under the as-cast condition. At high temperature, unlike the Mg-10Y-2.45Zn alloy, a large number of 18R LPSO phases dissolved and grew at the grain boundaries of Mg-10Y-2.45Zn-1Ca-0.37Al, the size of α-Mg grains coarsen. At high temperature and high plastic deformation, massive 18R LPSO kinked, delamination or crushed, dynamic recrystallization occured at the vicinity of the 18R LPSO phase boundary and a large number of fine rod-like 14H LPSO phases precipitatied in α-Mg matrix conspire to strengthen the alloy.

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[Zhao Yuan-liang, Bian Li-ping, Zhao Xing-guo, Zeng Hang-hang, Liang Wei, Meng Yu-pu. Microstructure Evolution and Mechanical Behavior of Mg-10Y-2.45Zn-1Ca-0.37Al Alloy[J]. Rare Metal Materials and Engineering,2019,48(7):2165~2170.]
DOI:10.12442/j. issn.1002-185X.20180077

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History
  • Received:January 20,2018
  • Revised:June 08,2019
  • Adopted:April 23,2018
  • Online: August 01,2019
  • Published: