| Single-aging characteristics of 7055 aluminum alloy |
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| 引用本文： | 王涛 尹志民 沈凯 李杰 黄继武. Single-aging characteristics of 7055 aluminum alloy[J]. 中国有色金属学会会刊, 2007, 17(3): 548-552. DOI: 10.1016/S1003-6326(07)60131-9 |
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| 作者姓名： | 王涛 尹志民 沈凯 李杰 黄继武 |
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| 作者单位： | [1]School of Materials Science and Engineering, Central South University, Changsha 410083, China; [2]School of Materials Science and Engineering, Nanjing University of Aeronautical and Airspace, Nanjing 210016, China |
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| 基金项目： | Foundation item： Porject（MKPT-05-302） supported by the 10th Five-Year Plan of China |
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| 摘 要： | The microstructures and properties of 7055 aluminum alloy were studied at different single-aging for up to 48 h using hardness test, tensile test, electrical conductivity measurement, XRD and TEM microstructure analysis. The results show that at the early stage of aging, the hardness and strength of the alloy increase rapidly, the peak hardness and strength are approached after 120 ℃ aging for 4 h, then maintained at a high level for a long time. The suitable single-aging treatment of 7055 alloy is 480 ℃, 1 h solution treatment and water quenching, then aging at 120 ℃ for 24 h. Under those condition, the tensile strength, yield strength, elongation and electrical conductivity of the studied alloy are 513 MPa, 462 MPa, 9.5% and 29%（IACS）, respectively. During aging, the solid solution decomposes and precipitation occurs. At the early aging stage of 120 ℃, GP zones form and then grow up gradually with increasing ageing time. η′ phase forms after ageing for 4 h and η phase starts to occur after 24 h aging.
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| 关 键 词： | 铝合金 老化 沉淀方法 显微结构 |
| 收稿时间： | 2006-06-29 |
| 修稿时间： | 2006-06-292006-09-27 |
Single-aging characteristics of 7055 aluminum alloy |
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| WANG Tao,YIN Zhi-min,SHEN Kai,LI Jie,HUANG ji-wu. Single-aging characteristics of 7055 aluminum alloy[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(3): 548-552. DOI: 10.1016/S1003-6326(07)60131-9 |
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| Authors: | WANG Tao YIN Zhi-min SHEN Kai LI Jie HUANG ji-wu |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. School of Materials Science and Engineering, Nanjing University of Aeronautical and Airspace, Nanjing 210016, China |
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| Abstract: | The microstructures and properties of 7055 aluminum alloy were studied at different single-aging for up to 48 h using hardness test, tensile test, electrical conductivity measurement, XRD and TEM microstructure analysis. The results show that at the early stage of aging, the hardness and strength of the alloy increase rapidly, the peak hardness and strength are approached after 120 °C aging for 4 h, then maintained at a high level for a long time. The suitable single-aging treatment of 7055 alloy is 480 °C. 1 h solution treatment and water quenching, then aging at 120 °C for 24 h. Under those condition, the tensile strength, yield strength, elongation and electrical conductivity of the studied alloy are 513 MPa, 462 MPa, 9.5% and 29%(IACS), respectively. During aging, the solid solution decomposes and precipitation occurs. At the early aging stage of 120 °C, GP zones form and then grow up gradually with increasing ageing time. η' phase forms after ageing for 4 h and η phase starts to occur after 24 h aging. |
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| Keywords: | 7055 aluminum alloy aging precipitation,microstructure property |
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