| Sr Microalloying for Refining Grain Size of AZ91D Magnesium Alloy |
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| 引用本文： | 潘义川. Sr Microalloying for Refining Grain Size of AZ91D Magnesium Alloy[J]. 武汉理工大学学报(材料科学英文版), 2007, 22(1): 74-76. DOI: 10.1007/s11595-005-1074-6 |
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| 作者姓名： | 潘义川 |
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| 作者单位： | The Key Laboratory of Liquid Structure and Heredity of Materials, Shandong University （southern campus）, Jinan 250061, China） |
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| 基金项目： | 国家自然科学基金;教育部重点科研项目 |
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| 摘 要： | The grain refining process of an AZ91D Mg alloy by Sr addition was studied and the heterogeneous nucleating particles of α-Mg were investigated by electron probe microanalysis （EPMA）. With 0.6 wt% Sr addition, the mean grain size of AZ91D alloy was refined from 235.4μm to 52.5 μm at the one-half radius of the ingot. The morphology of primary crystal changed from a sixford symmetrical shape to a petallike shape, Mg-Sr-Al-Fe-Mn heterogeneous nucleating particles were observed at the grain centers and Sr solute atoms presented segregation along the grain boundaries. Grain refinement was facilitated by both the Mg-Sr-Al- Fe-Mn nucleating particles and the Sr solute atoms, and the former played a dominate role in the process.
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| 关 键 词： | AZ91D 镁合金 晶粒细化 锶 微合金化 成核作用 |
| 收稿时间： | 2005-01-22 |
| 修稿时间： | 2006-03-30 |
Sr microalloying for refining grain size of AZ91D Magnesium alloy |
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| Pan Yichuan,Liu Xiangfa,Yang Hua. Sr microalloying for refining grain size of AZ91D Magnesium alloy[J]. Journal of Wuhan University of Technology. Materials Science Edition, 2007, 22(1): 74-76. DOI: 10.1007/s11595-005-1074-6 |
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| Authors: | Pan Yichuan Liu Xiangfa Yang Hua |
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| Affiliation: | (1) The Key Laboratory of Liquid Structure and Heredity of Materials, Shandong University (southern campus), Jinan, 250061, China |
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| Abstract: | The grain refining process of an AZ91D Mg alloy by Sr addition was studied and the heterogeneous nucleating particles of α-Mg were investigated by electron probe microanalysis (EPMA). With 0.6 wt% Sr addition, the mean grain size of AZ91D alloy was refined from 235.4 μm to 52.5 μm at the one-half radius of the ingot. The morphology of primary crystal changed from a sixford symmetrical shape to a petal-like shape. Mg-Sr-Al-Fe-Mn heterogeneous nucleating particles were observed at the grain centers and Sr solute atoms presented segregation along the grain boundaries. Grain refinement was facilitated by both the Mg-Sr-Al-Fe-Mn nucleating particles and the Sr solute atoms, and the former played a dominate role in the process. Funded by the National Natural Science Foundation of China (No. 50171037) and Key Project of Science and Technology Research of Ministry of Education of China (No. 01105) |
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| Keywords: | AZ91D Mg alloy grain refinement strontium heterogeneous nucleation |
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