Microstructure and Mechanical Properties of Mg-6Al-2Sr-xNd Magnesium Alloy

Li Jianhui; Du Wenbo; Wu Yufeng; Zuo Tieyong

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Microstructure and Mechanical Properties of Mg-6Al-2Sr-xNd Magnesium Alloy
Issue 6, Pages: 482-484(2007)
Published： 2007 ，
DOI：

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[1]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(06):482-484+410.

Li Jianhui, Du Wenbo, Wu Yufeng, et al. Microstructure and Mechanical Properties of Mg-6Al-2Sr-xNd Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (6):482-484(2007)
[1]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(06):482-484+410. DOI：

Li Jianhui, Du Wenbo, Wu Yufeng, et al. Microstructure and Mechanical Properties of Mg-6Al-2Sr-xNd Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (6):482-484(2007) DOI：

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。

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.