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王玉娇,江海涛,柳超敏,张韵,郭文启,康强,徐哲,王盼盼.Ca对Mg-Gd-Y-Zn-Zr合金热变形行为及热加工性能的影响[J].稀有金属材料与工程(英文),2020,49(5):1650~1656.[Yujiao Wang,Haitao Jiang,Chaomin Liu,Yun Zhang,Wenqi Guo,Qiang Kang,Zhe Xu and Panpan Wang.Effect of Ca-addition on Hot deformation Behavior and Workability of Mg-Gd-Y-Zn-Zr Alloy[J].Rare Metal Materials and Engineering,2020,49(5):1650~1656.]
Effect of Ca-addition on Hot deformation Behavior and Workability of Mg-Gd-Y-Zn-Zr Alloy
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Received:March 12, 2019  Revised:April 22, 2019
DOI:
Key words: Mg-Gd-Y-Zn-Zr  Ca addition  hot deformation behavior  constitutive equation  processing map
Foundation item:中央高校基本科研业务费资助(项目号2302016FRF-IC-16-003,2302017FRF-IC-17-001,2302018FRF-IC-18-004)
Author NameAffiliation
Yujiao Wang,Haitao Jiang,Chaomin Liu,Yun Zhang,Wenqi Guo,Qiang Kang,Zhe Xu and Panpan Wang  
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Abstract:
      In this paper, effect of Ca on hot deformation behavior and workability of Mg-Gd-Y-Zn-Zr alloy were investigated by Gleeble 3500 thermal simulation tester conducted at a temperature ranging from 573K to 723K and strain rate varying from 0.001s-1 to 1s-1. It’s indicated that the addition of Ca increased the flow stress and hot deformation active energy, widened the range of processing stable zone and the optimal processing zone, but decreased the maximum power dissipation efficient, and inhibited the dynamic recrystallization. Combined the microstructure after thermal compression which was analyzed by laser confocal microscopy, the accuracy of the processing map was verified. The optimized hot processing parameters of Mg-Gd-Y-Zn-Zr were formulated, namely strain rate ranging from 0.001s-1 to 0.01s-1, temperature ranging from 623K to 723K. Depending on the optimum processing parameters, an isothermal forged magnesium alloy with good quality and no deformation defects was fabricated.