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首页> 外文会议>Materials forum - aluminium alloys, their physical and mechanical properties - Volume 28 - 2004 >Effect of Copper, Silver and Gold on Tensile behaviour in Al-Mg-Si Alloy
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Effect of Copper, Silver and Gold on Tensile behaviour in Al-Mg-Si Alloy

机译：铜，银和金对Al-Mg-Si合金拉伸性能的影响

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摘要

It is very popular to improve mechanical properties of Al-Mg-Si alloys by adding otherrnelement. For example, it is well known that addition of transition metals is useful becausernthe refinement of grain size can be achieved, and with the addition of Cu to Al-Mg-Si alloyrncan increase the strength and hardness of the materials. Also, there are a few reportsrnabout the addition of Ag and Au, which is particularly good for elongation. However, evenrnnow it has not been clarified yet why Cu, Ag and Au are useful in improving alloysrnelongation. In this work, we have investigated the tensile behaviour of two types of Al-Mg-rnSi alloy, namely balanced alloy and excess Si alloy, which both contain Cu, Ag and Au.rnThe tensile test and hardness measurement were carried out. Microstructures of thernmatrix and the grain boundary were observed with TEM, and SEM was used to investigaternthe fracture surfaces. Elongation of the alloys bearing Cu, Ag and Au were essentiallyrnimproved, and the width of the precipitate free zone was found to be wider than alloysrnwithout those three elements.
机译：通过添加其他元素来改善Al-Mg-Si合金的机械性能非常普遍。例如，众所周知，添加过渡金属是有用的，因为可以实现晶粒尺寸的细化，并且在Al-Mg-Si合金中添加Cu可以提高材料的强度和硬度。另外，也有一些关于添加Ag和Au的报道，这对于延展特别有利。但是，至今仍不清楚为什么Cu，Ag和Au可用于改善合金的伸长率。在这项工作中，我们研究了两种均含有铜，银和金的Al-Mg-rnSi合金（即平衡合金和过量Si合金）的拉伸行为。进行了拉伸试验和硬度测量。用TEM观察了基体组织和晶界，并用SEM研究了断口的形貌。含Cu，Ag和Au的合金的伸长率基本上得到了改善，并且发现无沉淀区的宽度比不含这三种元素的合金要宽。

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