| 稀土镁合金铸造和挤压态组织及力学性能研究 |
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| 引用本文： | 吴安如,夏长清.稀土镁合金铸造和挤压态组织及力学性能研究[J].铸造,2005,54(11):1113-1116. |
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| 作者姓名： | 吴安如 夏长清 |
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| 作者单位： | 1. 湖南工程学院机械电子工程系,湖南,湘潭,411101;中南大学材料科学与工程学院,湖南,长沙,410083
2. 中南大学材料科学与工程学院,湖南,长沙,410083 |
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| 摘 要： | 制备了3种不同成分的镁-稀土合金,研究稀土(RE)元素铈(Ce)、钕(Nd)和钇(Y)对镁合金铸态组织、力学性能尤其是高温力学性能的影响.采用光学显微镜(OM)、扫描电子显微镜(SEM)及X射线衍射(XRD)仪等对3种镁-稀土合金组织及相组成进行了分析.稀土元素与镁形成的镁-稀土相分别为Mg12Ce、Mg17Ce2、Mg12Nd、Mg24Y5、Mg41Nd5,主要分布在铸态组织晶界.对3种合金的铸态试样进行了室温力学性能及高温力学性能试验,并与挤压态比较,结果显示:在镁合金中,Nd的强化作用优于Ce,在高温时,Nd和Y共同强化作用优于Nd.
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| 关 键 词： | 稀土元素 镁-稀土相 显微组织 力学性能 |
| 文章编号： | 1001-4977(2005)11-1113-04 |
| 收稿时间： | 2005-03-18 |
| 修稿时间： | 2005-07-10 |
Study on the Microstructure and Mechanical Properties of the Mg-RE Alloys at As-cast and As-extrusion |
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| WU An-ru,XIA Chang-qing.Study on the Microstructure and Mechanical Properties of the Mg-RE Alloys at As-cast and As-extrusion[J].Foundry,2005,54(11):1113-1116. |
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| Authors: | WU An-ru XIA Chang-qing |
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| Affiliation: | 1. Dept. of Elect. and Mech. Eng, Hunan Institute of Engineering, Xiangtan 411101, Hunan, China; 2. School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China |
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| Abstract: | Three kinds of Mg-RE alloys were prepared in the interest of analyze the influence of the Rare Earth (RE) elements on the mechanical properties in Mg alloys at room temperature and elevated temperature. The microstructure and the phase composition of the three Mg-RE alloys were analyzed by means of Optical Microscopy (OM), Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). It is shown that Mg12Ce, Mg17Ce2, Mg12Nd, Mg24Y5 and Mg41Nd5 distribute mainly in the grain boundary of as-cast microstructure. After the mechanical properties experiment of these alloys in as-extruded and as-casting at room and elevated temperature, the result reveal that the strengthening effect of Nd is better than that of Ce. The strengthening effect of Nd and Y is better than that of Nd at elevated temperature. |
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| Keywords: | rare earth element Mg-RE phase microstructure mechanical properties |
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