| 微量钪对Al-9.0Zn-2.5Mg-1.2Cu-0.15Zr合金组织性能的影响 |
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| 引用本文： | 戴晓元,夏长清,吴安如,王银娜,邰凯平.微量钪对Al-9.0Zn-2.5Mg-1.2Cu-0.15Zr合金组织性能的影响[J].矿冶工程,2005,25(5):70-73. |
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| 作者姓名： | 戴晓元 夏长清 吴安如 王银娜 邰凯平 |
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| 作者单位： | 1. 中南大学,材料科学与工程学院,湖南,长沙,410083;长沙理工大学,汽车机械学院,湖南,长沙,410076
2. 中南大学,材料科学与工程学院,湖南,长沙,410083 |
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| 基金项目： | 国家重点基础研究发展规划项目（国家973计划项目）（G1999064911-2）. |
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| 摘 要： | 采用铸锭冶金法制备了Al-9．0Zn-2．5Mg-1．2Cu-0．15Zr和Al-9．0Zn-2．5Mg-1．2Cu-0．12Sc．0．15Zr合金，采用金相显微镜、扫描电子显微镜和透射电子显微镜研究了2种合金不同处理态的显微组织，测试了不同热处理状态下合金的力学性能和电导率。结果表明：添加微量Sc可以明显细化合金的铸态晶粒，显著提高Al-Zn-Mg-Cu-Zr合金的力学性能和电导率，其作用机理主要为仙（Sc，Zr）引起的细晶强化、亚结构强化和沉淀强化。
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| 关 键 词： | Sc Al-Zn-Mg-Cu-Zr合金 力学性能 电导率 显微组织 |
| 文章编号： | 0253-6099(2005)05-0070-04 |
| 收稿时间： | 2005-01-14 |
| 修稿时间： | 2005年1月14日 |
Effects of Trace Sc on Microstructures and Properties of Al-9.0Zn-2.5Mg-1.2Cu-0.15Zr Alloys |
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| DAI Xiao-yuan,XIA Chang-qing,WU An-ru,WANG Yin-na,TAI Kai-ping.Effects of Trace Sc on Microstructures and Properties of Al-9.0Zn-2.5Mg-1.2Cu-0.15Zr Alloys[J].Mining and Metallurgical Engineering,2005,25(5):70-73. |
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| Authors: | DAI Xiao-yuan XIA Chang-qing WU An-ru WANG Yin-na TAI Kai-ping |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China; 2. School of Automobile and Machinery Engineering, Changsha University of Science and Technology, Changsha 410076, Hunan, China |
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| Abstract: | Al-Zn-Mg-Cu-Zr based alloys with or without Sc were produced by ingot metallurgical process.The tensile mechanical properties and electric conductivity of the alloys under different conditions were tested and the microstructures of the alloys were studied by using optical microscope,scanning electron microscope(SME) and transmission electron microscope(TME).The results show that adding trace Sc can greatly decrease the grain size of the Al-Zn-Mg-Cu-Zr alloy ingots and obviously improve the tensile properties and electric conductivity of the Al-Zn-Mg-Cu-Zr alloys.The strengthening mechanism is fine grain strengthening,substructure strengthening and precipitation strengthening caused by Al_3(Sc,Zr). |
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| Keywords: | Sc Al-Zn-Mg-Cu-Zr alloy mechanical property electric conductivity micmstmcture |
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