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赵元亮,边丽萍,赵兴国,曾航航,梁伟,孟棫朴.Mg-10Y-2.45Zn-1Ca-0.37Al合金的组织演变及力学行为[J].稀有金属材料与工程(英文),2019,48(7):2165~2170.[Zhao Yuan-liang,Bian Li-ping,Zhao Xing-guo,Zeng Hang-hang,Liang Wei and 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.]
Microstructure Evolution and Mechanical Behavior of Mg-10Y-2.45Zn-1Ca-0.37Al Alloy
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Received:January 20, 2018  Revised:June 08, 2019
DOI:
Key words: Mg-Y-Zn-Ca-Al alloy  Long-period Stacking Ordered Structure  Microstructure  Mechanical Properties
Foundation item:国家自然科学基金资助(51401143);山西省青年科技研究资助(2014021017-1).
Author NameAffiliation
Zhao Yuan-liang,Bian Li-ping,Zhao Xing-guo,Zeng Hang-hang,Liang Wei and Meng Yu-pu  
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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.