| 含钪Al-Zn-Mg-Cu-Zr合金组织性能的研究 |
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| 引用本文： | 戴晓元,夏长清,李杨勇,孙振起.含钪Al-Zn-Mg-Cu-Zr合金组织性能的研究[J].中国稀土学报,2006,24(5):599-604. |
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| 作者姓名： | 戴晓元 夏长清 李杨勇 孙振起 |
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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;长沙理工大学材料科学与工程学院,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计划(973计划) |
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| 摘 要： | 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微量钪对Al-Zn-Mg-Cu-Zr系合金组织的影响，测试了不同热处理状态下台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，其作用机制主要为AJ3（Sc，Zr）引起的细晶强化、亚结构强化和沉淀强化；Al-9．0Zn-2．5Mg-1．2Cu-0．15Zr-0．12Sc和Al-9．5Zn-2．5Mg-1．2Cu-0．15Zr-0．12Sc经强化固溶和T6处理后，抗拉强度分别达到829．4和818．6MPa。
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| 关 键 词： | 钪 显微组织 机械性能 电导率 稀土 |
| 文章编号： | 1000-4343（2006）05-0599-06 |
| 收稿时间： | 03 18 2006 12:00AM |
| 修稿时间： | 2006-03-182006-04-30 |
Microstructures and Properties of Al-Zn-Mg-Cu-Zr Alloys with Minor Scandium |
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| Dai Xiaoyuan,Xia Changqing,Li Yangyong,Sun Zhenqi.Microstructures and Properties of Al-Zn-Mg-Cu-Zr Alloys with Minor Scandium[J].Journal of the Chinese Rare Earth Society,2006,24(5):599-604. |
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| Authors: | Dai Xiaoyuan Xia Changqing Li Yangyong Sun Zhenqi |
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| Institution: | 1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China |
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| Abstract: | The microstructures of Al-Zn-Mg-Cu-Zr alloys with minor Sc were studied by using optical microscope(OM),scanning electron microscope(SEM) and transmission electron microscope(TEM).The tensile mechanical properties and electric conductivity of the studied alloys under different treatment conditions were tested.The results show that adding minor Sc can greatly fine the grain size of the Al-Zn-Mg-Cu-Zr alloy ingots and obviously improve the tensile properties and electric conductivity of the alloys.The strengthening mechanism is considered as fine grain strengthening,sub-structure strengthening and dispersion strengthening by Al_3(Sc,Zr).After strengthening solution and T6,the tensile strength of Al-9.0Zn-2.5Mg-1.2Cu-0.15Zr-0.12Sc and Al-9.5Zn-2.5Mg-1.2Cu-0.15Zr-0.12Sc are 829.4,818.6 MPa respectively. |
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| Keywords: | scandium microstructures mechanical properties electric conductivity rare earths |
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