The influence of beryllium addition on the microstructure and mechanical properties of Al-15%Mg2Si in-situ metal matrix composite
The influence of beryllium addition on the microstructure and mechanical properties of Al-15%Mg2Si in-situ metal matrix composite
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DOI：
10.1016/j.msea.2011.07.048
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发表时间：
2011-10-25
期刊：
影响因子：
6.4
通讯作者：
Karamouz, Mostafa
中科院分区：
文献类型：
--
作者：
Azarbarmas, Mortaza;Emamy, Masoud;Karamouz, Mostafa
研究了铍（Be）对Al-15%Mg2Si复合材料显微组织和力学性能的影响。结果表明：随着Be含量的增加，初生Mg(2)Sl颗粒的平均尺寸和体积分数减小；含Be和不含Be的Mg2Si伪共晶均以细纤维组织为主。然而，在含Be的试样中，裂纹沿胞界扩展的路径是非常曲折的。同时，在含有Be的样品中观察到基于Al-Mg体系β - al3mg2相的β (Al-Mg-Be)相。结果表明，添加Be后，合金的极限抗拉强度和伸长率均有所提高。通过扫描电子显微镜对试样断口表面的研究发现，Be增加了细小韧窝和脱相干Mg2Si颗粒的数量。(C) 2011 Elsevier B.V.版权所有
The effects of Beryllium (Be) on the microstructure and mechanical properties of Al-15%Mg2Si composite were investigated. The results showed that with the increase of Be content, the average size and volume fraction of primary Mg(2)Sl particles decreases. Pseudo-eutectic Mg2Si has mainly a fine fibrous structure in both specimens with and without Be. However, in the samples containing Be, the path for crack propagation along cell boundaries is very tortuous. Meanwhile, beta(Al-Mg-Be) phase based on a beta-Al3Mg2 phase of the Al-Mg system was observed in specimens containing Be. It was found that with the addition of Be the ultimate tensile strength (UTS) and elongation values improved. A study of the specimen's fracture surfaces via scanning electron microscope revealed that Be increases the number of fine dimples and decohered Mg2Si particles. (C) 2011 Elsevier B.V. All rights reserved.