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| Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金的组织和性能 | |
| 引用本文： | 戴晓元,夏长清,孙振起,华熳煜,吴茵. Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金的组织和性能[J]. 中国有色金属学报, 2007, 17(3): 396-401 |
| 作者姓名： | 戴晓元 夏长清 孙振起 华熳煜 吴茵 |
| 作者单位： | 1. 长沙理工大学,材料科学与工程学院,长沙,410076;中南大学,材料科学与工程学院,长沙,410083 2. 中南大学,材料科学与工程学院,长沙,410083 3. 长沙理工大学,材料科学与工程学院,长沙,410076 |
| 摘 要： | 通过金相、扫描电镜、透射电镜和X射线衍射仪以及拉伸性能和电导率测试,研究Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金的组织性能。研究结果表明：含0.12%Sc的7000系铝合金铸态组织为细小的等轴晶;合金经强化固溶和T6处理后,抗拉强度σb达829.4MPa,伸长率δ为5.7%;合金经一般固溶及RRA处理后,σb为733.4MPa,δ为5.4%,电导率为37.6%。合金强化机理主要为Al3（Sc,Zr）引起的细晶强化、亚结构强化和沉淀强化。 |
| 关 键 词： | 超高强铝合金 显微组织 力学性能 电导率 |
| 文章编号： | 1004-0609（2007）03-0396-06 |
| 收稿时间： | 2006-09-07 |
| 修稿时间： | 2006-12-13 |
Microstructure and properties of Al-9.0Zn-2.5Mg- 1.2Cu-0.12Sc-0.15Zr alloy |
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| DAI Xiao-yuan,XIA Chang-qing,SUN Zhen-qi,HUA Man-yu,WU Yin. Microstructure and properties of Al-9.0Zn-2.5Mg- 1.2Cu-0.12Sc-0.15Zr alloy[J]. The Chinese Journal of Nonferrous Metals, 2007, 17(3): 396-401 | |
| Authors: | DAI Xiao-yuan XIA Chang-qing SUN Zhen-qi HUA Man-yu WU Yin |
| Affiliation: | 1. School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China; 2. School of Materials Science and Engineering, Central South University, Changsha 410083, China |
| Abstract: | The microstructure and properties of Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr alloy under different treatment conditions were investigated by using optical microscope(OM),scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray diffractometry and measurements of tensile properties and electric conductivity.The results show that the as-cast microstructures of 7 000 series alloys with 0.12%Sc are equiaxed.After strengthening solution and T6 treatment,the tensile strength and elongation of studied alloy are 829.4 MPa and 5.7%,respectively.After solution and RRA,the tensile strength,elongation and electric conductivity of studied alloy are 733.4 MPa,5.4% and 37.6%,respectively.The strengthening mechanisms are mainly sub-structure strengthening,precipitation strengthening and solution strengthening of Al3(Sc,Zr). |
| Keywords: | Sc |
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