| 1.0 wt% Li对Al-Zn-Mg-Cu合金析出相的影响(英文) |
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| 引用本文： | Wei Fang a,b,*,Li Jinshana,Hu Ruia,Kou Hongchaoa aState Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an ,China bBeijing Xinghang Mechanical-electrical Equipment Factory,Beijing ,China.1.0 wt% Li对Al-Zn-Mg-Cu合金析出相的影响(英文)[J].中国航空学报,2008,21(6):565-570. |
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| 作者姓名： | Wei Fang a b * Li Jinshana Hu Ruia Kou Hongchaoa aState Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi’an China bBeijing Xinghang Mechanical-electrical Equipment Factory Beijing China |
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| 作者单位： | 西北工业大学凝固国家重点实验室，北京星航机电设备厂 |
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| 基金项目： | Foundation items： National Basic Research Program of China （G19990649）; National High-tech Research and Development Program of China |
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| 摘 要： | Microstructure control always plays a key role in enhancing properties of high-strength Al alloys. Attempts to improve the microstructure of 7000 series alloys by addition of 1.0 wt% Li have been made for a long time, but unsystematically. This article compares the microstructural features of 1.0 wt% Li-containing A1-Zn-Mg-Cu alloy with those of Li-free Al-Zn-Mg-Cu alloy by using differential scanning calorimetric （DSC） techniques, Vickers microhardness and transmission electron microscopy （TEM）. The results show the dominance of Guinier Preston （GP） zones, η＇ or η phases in 1.0 wt% Li-containing Al-Zn-Mg-Cu alloy, and confirm the capability of Li to retard the rate of precipitates growth and coarsening.
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| 关 键 词： | Al-Zn-Mg-Cu-Li 合金 沉淀物 DSC TEM 微硬度 |
| 收稿时间： | 27 December 2007 |
Influence of 1.0 wt% Li on Precipitates in Al-Zn-Mg-Cu Alloy |
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| Wei , Li Jinshan, Hu Rui,Kou Hongchao.Influence of 1.0 wt% Li on Precipitates in Al-Zn-Mg-Cu Alloy[J].Chinese Journal of Aeronautics,2008,21(6):565-570. |
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| Authors: | Wei Li Jinshan Hu Rui Kou Hongchao |
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| Institution: | aState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;bBeijing Xinghang Mechanical-electrical Equipment Factory, Beijing 100074, China |
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| Abstract: | Microstructure control always plays a key role in enhancing properties of high-strength Al alloys. Attempts to improve the microstructure of 7000 series alloys by addition of 1.0 wt% Li have been made for a long time, but unsystematically. This article compares the microstructural features of 1.0 wt% Li-containing Al-Zn-Mg-Cu alloy with those of Li-free Al-Zn-Mg-Cu alloy by using differential scanning calorimetric (DSC) techniques, Vickers microhardness and transmission electron microscopy (TEM). The results show the dominance of Guinier Preston (GP) zones, η′or ηphases in 1.0 wt% Li-containing Al-Zn-Mg-Cu alloy, and confirm the capability of Li to retard the rate of precipitates growth and coarsening. |
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| Keywords: | Al-Zn-Mg-Cu-Li alloys precipitates DSC TEM microhardness |
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