| Mg-Zn-xCu-Ce镁合金铸态组织与力学性能 |
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| 引用本文： | 胡耀波,赵冲,吴福洲,李亚妮. Mg-Zn-xCu-Ce镁合金铸态组织与力学性能[J]. 材料工程, 2012, 5(5): 1-5. DOI: 10.3969/j.issn.1001-4381.2012.05.001 |
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| 作者姓名： | 胡耀波 赵冲 吴福洲 李亚妮 |
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| 作者单位： | 1.重庆大学材料科学与工程学院,重庆400044;重庆大学国家镁合金材料工程技术研究中心,重庆400044;2.重庆大学材料科学与工程学院,重庆,400044 |
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| 基金项目： | 重庆大学中央高校基本科研业务费(CDJZR10130020),重庆大学大型仪器设备开放基金(2010011505),重庆大学研究生科技创新基金(CDJZR11130031);国家科技支撑计划项目(2011BAE22B04) |
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| 摘 要： | 利用光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射(XRD)分析了Cu元素对Mg-Zn-xCu-Ce合金铸态组织的影响,并用显微硬度仪测试合金的显微硬度.结果表明:Cu含量的增加可以显著细化晶粒.当Zn,Cu质量比小于1时,合金枝晶间共晶组织由薄层状α-Mg+CuMgZn组成;当Zn,Cu质量比等于1时,合金中出现Mg2Cu相,同时共晶组织开始粗化;随着Cu含量的升高(Cu质量分数大于Zn),合金枝晶间共晶组织由α-Mg+CuMgZn+Mg2Cu组成,在形态上由薄层状转变为蜂窝状.合金的显微硬度随着Cu含量升高而增加.
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| 关 键 词： | Mg-Zn-xCu-Ce镁合金 共晶组织 晶粒细化 硬度 |
Microstructure and Mechanical Properties of As-cast Mg-Zn-xCu-Ce Alloys |
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| HU Yao-bo , ZHAO Chong , WU Fu-zhou , LI Ya-ni. Microstructure and Mechanical Properties of As-cast Mg-Zn-xCu-Ce Alloys[J]. Journal of Materials Engineering, 2012, 5(5): 1-5. DOI: 10.3969/j.issn.1001-4381.2012.05.001 |
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| Authors: | HU Yao-bo ZHAO Chong WU Fu-zhou LI Ya-ni |
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| Affiliation: | 1(1 College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;2 National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China) |
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| Abstract: | The effect of Cu element on microstructure and mechanical properties of as-cast Mg-Zn-xCu-Ce alloy was investigated by optical microscope(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD) and Vickers-hardness tester.The results show that the grain size significantly refines from 135μm to 86μm with Cu added.In the case of Cu mass fraction less than Zn,the thin layer of eutectic phases comprises α-Mg and CuMgZn at interdendritic.The Mg2Cu second phase appears in eutectic and the microstructure of eutectic phases begins to coarsen when Zn,Cu mass ratio equals to 1.With the content of Cu further increases(mass fraction of Cu greater than Zn),eutectic(α-Mg+CuMgZn+Mg2Cu) forms at interdendritic,and eutectic changes thin layer into the honeycomb on morphology.The microhardness of as-cast alloy increases with Cu added. |
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| Keywords: | Mg-Zn-xCu-Ce magnesium alloy eutectic grain refining hardness |
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