| Mg-Al-Nd/Sr耐热镁合金的组织结构与蠕变性能 |
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| 引用本文： | 吴玉锋,杜文博,左铁镛.Mg-Al-Nd/Sr耐热镁合金的组织结构与蠕变性能[J].中国有色金属学报,2010,20(9). |
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| 作者姓名： | 吴玉锋 杜文博 左铁镛 |
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| 作者单位： | 1. 北京工业大学,循环经济研究院,北京,100124;北京工业大学,材料科学与工程学院,北京,100124
2. 北京工业大学,材料科学与工程学院,北京,100124 |
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| 基金项目： | 国家重点基础研究发展计划资助项目，北京市重点交叉学科资助项目 |
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| 摘 要： | 以Mg-6Al合金为基体,分别单一添加稀土Nd、Sr和复合添加稀土Nd和碱土Sr元素,采用水冷模工艺制备Mg-6Al-6Nd,Mg-6Al-2Sr和Mg-6Al-2Sr-2Nd耐热镁合金,并比较研究单一添加Nd或Sr和复合添加稀土Nd和碱土Sr对合金组织结构和蠕变性能的影响。结果表明:复合添加稀土Nd和碱土Sr后,合金中除了析出第二相Al2Nd、Al11Nd3和Al4Sr外,还析出Sr和Nd相互取代的Al4(Sr,Nd)和Al11(Nd,Sr)3复合相;在Mg-6Al-2Sr基础上添加2%Nd,不仅细化合金枝晶间距,还显著地提高第二相的分布密度,增强合金蠕变过程中位错与第二相交互作用,提高合金的蠕变性能。
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| 关 键 词： | 镁合金 耐热镁合金 碱土 稀土 耐热性 蠕变性能 |
Microstructures and creep properties of heat-resistant Mg-Al-Nd/Sr alloys |
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| WU Yu-feng,DU Wen-bo,ZUO Tie-yong.Microstructures and creep properties of heat-resistant Mg-Al-Nd/Sr alloys[J].The Chinese Journal of Nonferrous Metals,2010,20(9). |
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| Authors: | WU Yu-feng DU Wen-bo ZUO Tie-yong |
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| Affiliation: | WU Yu-feng1,2,DU Wen-bo2,ZUO Tie-yong1,2(1.Institute of Recycling Economy,Beijing University of Technology,Beijing 100124,China,2.College of Materials Science and Engineering,China) |
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| Abstract: | By single addition of Nd or Sr,and combined addition of Nd and Sr into Mg-6Al matrix alloys,heat-resistant Mg-6Al-6Nd,Mg-6Al-2Sr and Mg-6Al-2Sr-2Nd were obtained by water cooled technology,respectively.The microstructures and creep properties of water-cooled Mg-6Al-2Sr-2Nd alloys were analyzed and compared to reveal the effects of addition means.The results show that when the Nd and Sr elements are added into the Mg-6Al matrix alloy together,there occur the complicated compound named Al4(Sr,Nd) with part Sr... |
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| Keywords: | magnesium alloy heat-resistant magnesium alkaline earth rare earth heat-resistance creep property |
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