| The Role of Calcium in Microstructural Refinement of AZ91 Magnesium Alloy |
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| 引用本文： | LIU Shengfa KANG Liugen HAN Hui WANG Zhongfan. The Role of Calcium in Microstructural Refinement of AZ91 Magnesium Alloy[J]. 武汉理工大学学报(材料科学英文版), 2006, 21(4): 45-47. DOI: 10.1007/BF02841202 |
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| 作者姓名： | LIU Shengfa KANG Liugen HAN Hui WANG Zhongfan |
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| 作者单位： | [1]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China [2]School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China |
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| 摘 要： | The effect of calcium addition on the microstructures of AZ91 magnesium alloy was investigated. It was found that a small amount of calcium in AZ91 allay produced a large decrease in the α- Mg grain size and the dispersed fine β-Mgt7 Alt2 phases. In addition, some Al4Ca particles were found to exist in the AZ91 alloy containing 0.5wt% Ca. EDS analysis and water-quenched technique revealed that the grain-refining mechanism of calcium for the AZ91 alloys was mainly attributed to the role of restricting growth of calcium in the primary α-Mg crystals.
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| 关 键 词： | 钙 微结构 镁 AZ91合金 |
| 收稿时间： | 2005-03-01 |
| 修稿时间： | 2006-02-19 |
The role of calcium in microstructural refinement of AZ91 magnesium alloy |
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| Liu Shengfa,Kang Liugen,Han Hui,Wang Zhongfan. The role of calcium in microstructural refinement of AZ91 magnesium alloy[J]. Journal of Wuhan University of Technology. Materials Science Edition, 2006, 21(4): 45-47. DOI: 10.1007/BF02841202 |
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| Authors: | Liu Shengfa Kang Liugen Han Hui Wang Zhongfan |
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| Affiliation: | (1) School of Materials Science and Engineering, Wuhan University of Technology, 430070 Wuhan, China;(2) School of Automotive Engineering, Wuhan University of Technology, 430070 Wuhan, China |
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| Abstract: | The effect of calcium addition on the microstructures of AZ91 magnesium alloy was investigated. It was found that a small
amount of calcium in AZ91 alloy produced a large decrease in the α-Mg grain size and the dispersed fine β-Mg17Al12 phases. In addition, some Al4 Ca particles were found to exist in the AZ91 alloy containing 0.5wt% Ca. EDS analysis and water-quenched technique revealed
that the grain-refining mechanism of calcium for the AZ91 alloys was mainly attributed to the role of restricting growth of
calcium in the primary α−Mg crystals.
Funded by the Natural Science Foundation of Hubei Province (No. 2004ABA110), the Research Foundation for the Doctoral Program
of Wuhan University of Technology (No. 471-38300843) |
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| Keywords: | AZ91 magnesium alloy calcium microstructural refinement |
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