| 稀土和银对 Mg-Li 合金显微组织及力学性能的影响 |
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| 引用本文： | 乐启炽,李洪晓.稀土和银对 Mg-Li 合金显微组织及力学性能的影响[J].兵器材料科学与工程,1997,20(4):9-13,,19,. |
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| 作者姓名： | 乐启炽 李洪晓 |
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| 作者单位： | 东北大学 |
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| 摘 要： | 通过正交实验确定了具有较高强度和塑性的Ｍｇ－７Ｌｉ－１４Ｚｎ合金中Ａｇ、Ｎｄ、Ｌａ和Ｃｅ的最优添加量，比较了其不同强化效果，并指出正交最优合金力学性能。通过ＴＥＭ组织观察，确定了各合金元素的析出相分别为Ｍｇ３Ａｇ、Ｍｇ１７Ｌａ２、Ｍｇ１７Ｃｅ２和Ｍｇ３Ｃｅ，而Ｎｄ则固溶于α相中形成固溶强化。
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| 关 键 词： | Mg－Li－Zn合金 力学性能 析出相 |
EFFECTS OF RE AND Ag ON MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-Li ALLOY |
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| Le Qichi,Li Hongxiao,Cui Jianzhong.EFFECTS OF RE AND Ag ON MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-Li ALLOY[J].Ordnance Material Science and Engineering,1997,20(4):9-13,,19,. |
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| Authors: | Le Qichi Li Hongxiao Cui Jianzhong |
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| Abstract: | The result of the orthogonal experiments indicates that Ag has the greatest effect on the strength of Mg-7Li-14Zn alloy, and the optimium quantities of additives are 1.6%Ag, 1.1%～1.3%Nd, 0.4%～0.6%La, 0.8%～1.0%Ce(wt), respectively. In this composition(ρ=1.694g/cm 3), the mechanical properties of the alloy are σ b= 405.1MPa, σ 0.2 =201.1MPa, δ=8.98%, after 370℃×1hr solid solution, water quenching, and 20hrs aging at 38℃. When Ag, Nd, La and Ce are added to the ternary alloy, Mg 3Ag, Mg 17 La 2, Mg 17 Ce 2 and Mg 3Ce phases are formed respectively, and Nd dissolves in α phase resulting in solid solution strengthening. |
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| Keywords: | Mg-Li-Zn alloy mechanical properties precipitation phases Correspondent: Le Qichi P O Box 317 Department of Metal Forming School of Material and Metallurgy Northeastern University Shenyang Liaoning 110006 |
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