| Mg-6Al-2Sr-xNd镁合金的显微组织和力学性能 |
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| 引用本文： | 李建辉,杜文博,吴玉锋,左铁镛.Mg-6Al-2Sr-xNd镁合金的显微组织和力学性能[J].特种铸造及有色合金,2007,27(6):482-484. |
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| 作者姓名： | 李建辉 杜文博 吴玉锋 左铁镛 |
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| 作者单位： | 北京工业大学材料科学与工程学院 |
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| 摘 要： | 研究了Mg-6Al-2Sr-xNd镁合金的显微组织和常温力学性能,探讨了合金中Nd与Sr复合添加后的存在形式及不同含量的Nd对合金常温力学性能的影响.结果表明：Al4Sr相呈网状沿晶界分布,而Al11Nd3相呈颗粒状或针状,在晶内、晶界均有析出.Al4Sr相在晶界起到了阻止晶界滑移的作用,Al11Nd3相在晶内有钉扎位错的作用,晶界晶内的双重强化提高了合金的强度.合金的抗拉强度、屈服强度和伸长率均在含Nd量为1.0%时达到了峰值.
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| 关 键 词： | 镁合金 显微组织 力学性能 |
| 文章编号： | 1001-2249（2007）06-0482-03 |
| 修稿时间： | 2007-01-16 |
Microstructure and Mechanical Properties of Mg-6Al-2Sr-xNd Magnesium Alloy |
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| Li Jianhui,Du Wenbo,Wu Yufeng,Zuo Tieyong.Microstructure and Mechanical Properties of Mg-6Al-2Sr-xNd Magnesium Alloy[J].Special Casting & Nonferrous Alloys,2007,27(6):482-484. |
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| Authors: | Li Jianhui Du Wenbo Wu Yufeng Zuo Tieyong |
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| Abstract: | The existence behavior of Sr and Nd elements in microstructure of Mg-6Al-2Sr-xNd magnesium alloy was observed,and the effects of Nd content on the mechanical properties of the alloy at room temperature were investigated.The results show that net-like Al4Sr phase is distributed along the grain boundary,and particle-like or acicular Al11Nd3 phase is precipitated from both grain and grain boundary.The increase of strength of the alloys is attributed to the Al4Sr phase inhibiting the sliding of grain boundaries and the Al11Nd3 phase pining the dislocation effectively.The maximum values of tensile strength,yield strength and elongation of the alloys can be observed with 1.0% Nd content. |
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| Keywords: | Sr Nd |
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