| Creep resistance of Mg-4 %Al-2 %RE-2 ? alloy |
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| 引用本文： | 薛山 孙扬善 诸天柏 强立峰 白晶 周健. Creep resistance of Mg-4 %Al-2 %RE-2 ? alloy[J]. 中国有色金属学会会刊, 2005, 15(4): 863-867 |
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| 作者姓名： | 薛山 孙扬善 诸天柏 强立峰 白晶 周健 |
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| 作者单位： | [1]Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China [2]Nanjing Welbow Metals Co Ltd, Nanjing 211221, China |
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| 基金项目： | 国家高技术研究发展计划(863计划)，江苏省自然科学基金 |
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| 摘 要： | The creep resistance of the alloy Mg-4Al-2RE-2Ca（AEC422） and the base alloy AE42 was studied. The results reveal that the precipitated phases of AEC422 consist of Al2La and Al2Ca by contrast with the precipitated phase Al11La3 in AE42, which is instable and decomposes to A1l2La and Al at high temperature. Creep resistance of AEC422 is significantly improved compared with that of AE42. The microstructure of AEC422 has no obvious changes after creep test at 175℃ and 70MPa, as compared to that before creep test, indicating that Al2La and Al2Ca have high thermal stability. Especially Al2Ca phase largely increases the strength of the grain boundaries in AEC422, which accounts for the creep resistance improvement.
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| 关 键 词： | 合金 Al2Ca 有色金属 稀土元素 |
| 文章编号： | 1003-6326（2005）04-0863-05 |
| 收稿时间： | 2004-11-12 |
| 修稿时间： | 2005-01-18 |
Creep resistance of Mg-4 %Al-2 %RE-2 %Ca alloy |
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| Xue Shan,SUN Yang-shan,BAI Jing,ZHOU Jian. Creep resistance of Mg-4 %Al-2 %RE-2 %Ca alloy[J]. Transactions of Nonferrous Metals Society of China, 2005, 15(4): 863-867 |
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| Authors: | Xue Shan SUN Yang-shan BAI Jing ZHOU Jian |
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| Abstract: | The creep resistance of the alloy Mg-4Al-2RE-2Ca(AEC422) and the base alloy AE42 was studied. The results reveal that the precipitated phases of AEC422 consist of Al2 La and Al2Ca by contrast with the precipitated phase Al11 La3 in AE42, which is instable and decomposes to Al2 La and Al at high temperature. Creep resistance of AEC422 is significantly improved compared with that of AE42. The microstructure of AEC422 has no obvious changes after creep test at 175 ℃ and 70 MPa, as compared to that before creep test, indicating that Al2La and Al2Ca have high thermal stability. Especially Al2Ca phase largely increases the strength of the grain boundaries in AEC422, which accounts for the creep resistance improvement. |
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| Keywords: | creep resistance grain boundaries sliding intermetallic phase |
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