| Effect of Yb addition on precipitation and microstructure of Al-Cu-Mg-Ag alloys |
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| 作者姓名： | 肖代红 黄伯云 |
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| 作者单位： | [1]State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China [2]Laboratory of Material Physics, Zhengzhou University, Zhengzhou 450052, China |
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| 基金项目： | Foundation item： Project（20070410986） support by Postdoctoral Research Foundation of China; Project（ZMPL07SW0002） support by Laboratory of Material Physics of Zhengzhou University, China |
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| 摘 要： | Al-Cu-Mg-Ag alloys with different Yb contents were prepared by ingot metallurgy and thermomechanical treatment. The effect of Yb addition on the precipitation and microstructure of the alloys was investigated using mechanical properties testing, optical microscopy, differential scanning calorimetry（DSC）, scanning electron microscopy（SEM） and transmission electron microscopy（TEM）. The results show that adding 0.10%-0.35% Yb accelerates the aging hardening process, increases the maximum hardness and the tensile strength of the extruded alloys from room temperature to 300 ℃. Trace Yb element addition refines the grains of the casting alloys from 85 μm to 30 μm, decreases the precipitation temperature of Ω phase. Moreover, the addition of Yb into AI-Cu-Mg-Ag alloy decreases the precipitates size, and improves the density and the thermal stability of.Ω phase between 200 ℃ and 300 ℃.
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| 关 键 词： | 铝合金 镱混合 机械性质 微观结构 |
| 收稿时间： | 15 July 2007 |
| 修稿时间： | 2007-07-15 |
Effect of Yb addition on precipitation and microstructure of Al-Cu-Mg-Ag alloys |
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| Dai-hong XIAO,Bai-yun HUANG.Effect of Yb addition on precipitation and microstructure of Al-Cu-Mg-Ag alloys[J].Transactions of Nonferrous Metals Society of China,2007,17(6):1181-1185. |
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| Authors: | Dai-hong XIAO Bai-yun HUANG |
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| Affiliation: | 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2. Laboratory of Material Physics, Zhengzhou University, Zhengzhou 450052, China |
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| Abstract: | Al-Cu-Mg-Ag alloys with different Yb contents were prepared by ingot metallurgy and thermomechanical treatment. The effect of Yb addition on the precipitation and microstructure of the alloys was investigated using mechanical properties testing, optical microscopy, differential scanning calorimetry(DSC), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that adding 0.10%-0.35% Yb accelerates the aging hardening process, increases the maximum hardness and the tensile strength of the extruded alloys from room temperature to 300 °C. Trace Yb element addition refines the grains of the casting alloys from 85 μm to 30 μm, decreases the precipitation temperature of Ω phase. Moreover, the addition of Yb into Al-Cu-Mg-Ag alloy decreases the precipitates size, and improves the density and the thermal stability of Ω phase between 200 °C and 300 °C. |
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| Keywords: | aluminum alloy Yb addition precipitation microstructure mechanical properties |
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