| Effect of tensile stress on microstructure evolution of Al-Cu-Mg-Ag alloys |
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| 作者姓名： | 周杰 刘志义 李云涛 刘延斌 夏卿坤 段水亮 |
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| 作者单位： | School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | Project（2005CB623705-04） supported by the National Basic Research Program of China |
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| 摘 要： | The effect of tensile stress on thermal microstructure evolution of Ω phase in an AI-Cu-Mg-Ag alloy with high Cu/Mg ratio and higher Ag content was investigated by transmission electron microcopy （TEM） .The samples were aged at 200 ℃ for 1 h （T6 condition）, then thermal exposed at 250 ℃ for 100 h with and without a tensile stress （130 MPa）, respectively. The results indicate that Ω precipitates uniformly disperse in the matrix as a major precipitate after artificially aging at 200℃ for 1 h （T6 condition）. Exposed at 250℃ for 100 h without stress, Ωprecipitates dissolve dramatically. Whereas, during stress exposure they coarsen unexpectedly rather than dissolve into matrix. It can be deduced that the stress retards the redissolution of Ω phase.
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| 关 键 词： | 铝 铜 合金 Ω相 热处理技术 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Effect of tensile stress on microstructure evolution of Al-Cu-Mg-Ag alloys |
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| ZHU Jie, LIU Zhi-yi, LI Yun-tao, LIU Yan-bin, XIA Qing-kun, DUAN Shui-liang.Effect of tensile stress on microstructure evolution of Al-Cu-Mg-Ag alloys[J].Transactions of Nonferrous Metals Society of China,2007,17(A01):322-325. |
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| Authors: | ZHU Jie LIU Zhi-yi LI Yun-tao LIU Yan-bin XIA Qing-kun DUAN Shui-liang |
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| Affiliation: | ZH0U Jie, LIU Zhi-yi, LI Yun-tao, LIU Yan-bin, XIA Qing-kun, DUAN Shui-liang |
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