Microstructure evolution of ZK60 magnesium alloy during homogenization

被引：2
|
作者：
He Y.-B. [1 ,2 ]
Pan Q.-L. [1 ,2 ]
Liu X.-Y. [1 ,2 ]
Li W.-B. [1 ,2 ]
机构：
[1] Department of Materials Science and Engineering, Central South University
[2] Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University
来源：
Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | 2011年 / 31卷 / 03期
关键词：
Dendrite segregation; Homogenization process; Kinetics equation; Microstructure; ZK60 magnesium alloy;
D O I：
10.3969/j.issn.1005-5053.2011.3.003
中图分类号：
学科分类号：
摘要：
The microstructure evolution and composition distribution of as-cast and homogenized ZK60 magnesium alloy were investigated by optical microscope, scanning electron microscope, energy dispersive X-ray diffraction and X-ray diffraction. The results show that serious dendrite segregation is existed in the ZK60 alloy ingot, a number of non-equilibrium eutectic phases which mainly contain α-Mg and Mg3Zn7 are segregated at the grain boundaries and between dendrites boundaries. The non-equilibrium eutectic phases are dissolved gradually with the increasing temperature and holding time after the homogenization process, and the dendrite segregation is eliminated. However, the alloy is over-burnt when the temperature is over 420°C. The optimal homogenization regime is suggested to be 400°C/12 h, which is basically consistent with the result obtained by homogenizing kinetics equation.
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页码：14 / 20
页数：6
相关论文
共 14 条
  • [1] Luo A., Magnesium: Current and potential automotive applications, JOM Journal of the Minerals, Metals and Materials Society, 54, 2, pp. 42-48, (2002)
  • [2] Mordike B.L., Ebert T., Magnesium: Properties-applications-potential, Materials Science and Engineering A, 302, 1, pp. 37-45, (2001)
  • [3] Stalmann A., Sebastian W., Friedrich H., Et al., Properties and Processing of Magnesium Wrought Products for Automotive Applications, Advanced Engineering Materials, 3, 12, pp. 969-974, (2001)
  • [4] Vanfleteren R., Magnesium for automotive applications, Advanced Materials and Processes, 149, 5, pp. 33-34, (1996)
  • [5] 8, pp. 32-35, (2004)
  • [6] 27, 9, pp. 80-85, (2004)
  • [7] 19, 6, pp. 573-580, (2005)
  • [8] 45, 7, pp. 887-891, (2009)
  • [9] 24, 4, pp. 58-62, (2010)
  • [10] 39, 1, pp. 106-111, (2010)
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