| 微量Y对AM50铸态合金组织及力学性能的影响 |
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| 引用本文： | 周桂斌,刘子利,刘希琴,朱晓春,李健.微量Y对AM50铸态合金组织及力学性能的影响[J].铸造工程,2011(4):17-20. |
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| 作者姓名： | 周桂斌 刘子利 刘希琴 朱晓春 李健 |
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| 作者单位： | 1. 南京航空航天大学材料科学与技术学院,江苏南京,210016
2. 江苏中翼汽车新材料科技有限公司,江苏常熟,215542 |
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| 基金项目： | 江苏省自然科学基金，江苏省科技支撑计划项目 |
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| 摘 要： | 利用光学显微镜、扫描电镜和X射线衍射仪，分析研究了微量Y对AM504铸态合金组织及其室温和高温（200℃）力学性能的影响。结果表明，在AM50合金中加入质量分数1％Y，晶粒细化，连续或半连续网状分布的β-Mg17Al12相呈骨骼状或颗粒状弥散分布，同时晶界附近有大量块状新相Al2Y生成；合金的室温和高温抗拉强度分别提高了18．9％和23．2％；屈服强度分别提高了16．1％和20．5％；合金伸长率分别提高9．1％和11．7％。
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| 关 键 词： | AM50 Y 显微组织 力学性能 |
Effect of Y Addition on Microstructure and Mechanical Property of As-cast AM50 Alloy |
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| Zhou Guibin,Liu Zili,Liu Xiqin,Zhu Xiaochun,Li Jian.Effect of Y Addition on Microstructure and Mechanical Property of As-cast AM50 Alloy[J].Foundry Engineering,2011(4):17-20. |
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| Authors: | Zhou Guibin Liu Zili Liu Xiqin Zhu Xiaochun Li Jian |
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| Affiliation: | 1. College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2. Jiangsu Favour Automotive New Stuff Sci-Tech Co., Ltd., Changshu 215542, Jiangsu, China) |
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| Abstract: | The microstructure and mechanical property of as-cast AM50 alloys with and without Y addition have been investigated by optical microscopy, scanning electron microscopy and energy dispersion X-ray analysis. The results show that with addition of 1%Y to AM50 alloy, the grain is refined, the continuous or semi-continuous network morphology of fl-Mg17Al~2 phase tends to be in the skeletal or granular shape, and a large number of blocky A12Y phase is formed nearby the grain boundaries. The ultimate tensile strength at room temperature and at elevated temperature are increased by 18.9 % and 23.2% respectively, while yield strength are increased by 16.1% and 20.5% respectively. Meanwhile, the values of elongation at room temperature and at elevated temperature are increased by 9.1% and 11.7% respectively. |
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| Keywords: | AM50 Y microstructure mechanical property |
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