An Investigation of Cavity Development in a Superplastic Aluminium Alloy Prepared by Equal-Channel Angular Pressing
An Investigation of Cavity Development in a Superplastic Aluminium Alloy Prepared by Equal-Channel Angular Pressing
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等通道角向压制超塑性铝合金型腔发育的研究
DOI：
10.4028/www.scientific.net/msf.357-359.521
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
T. Langdon
中科院分区：
文献类型：
--
作者：
Cheng Xu;S. Lee;T. Langdon
实验在一种名为 Supral 100 的商业铝 Al-2004 合金上进行，该合金含有 6% Cu 和 0.4% Zr。该材料在一系列实验条件下进行等通道角压制 (ECAP)，并使用标准拉伸测试确定压制样品的机械性能。将样品拉至失效，然后使用金相技术定量记录内部空化水平。结果表明，该合金在 ECAP 后表现出良好的超塑性，总拉伸伸长率高达 >1000%。与传统的超塑性一样，该合金在压制状态下会产生广泛的内部空化。报告这些空腔的平均尺寸和形状的测量结果。
Experiments were conducted on a commercial aluminum Al-2004 alloy known as Supral 100 and containing 6% Cu and 0.4% Zr. This material was subjected to Equal-Channel Angular Pressing (ECAP) over a range of experimental conditions and the mechanical properties of the as-pressed samples were determined using standard tensile testing. Samples were pulled to failure and the level of internal cavitation was then recorded quantitatively using metallographic techniques. The results show this alloy exhibits good superplastic properties after ECAP with total tensile elongations up to >1000%. As in conventional superplasticity, there is the development of extensive internal cavitation in this alloy in the as-pressed condition. Measurements are reported for the average sizes and shapes of these cavities.