文章基本信息

标题：Structural and compositional study of precipitates in under-aged Cu-added Al-Mg-Si alloy
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作者：Takuya Maeda ; Kenji Kaneko ; Takuya Namba 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2018
卷号：8
期号：1
页码：16629
DOI：10.1038/s41598-018-35134-8
语种：English
出版社：Springer Nature
摘要：(x ≈ 1) with solute Cu atoms replacing Al site of β" precipitate. In the case of disordered precipitates, the precipitates were found to consist of β" sub-unit cells, three-fold symmetric structure without Cu atoms, Cu containing structures termed as "Cu sub-unit cluster", and Q' sub-unit cells. Among these structures, the morphologies of three-fold symmetric structure without Cu atoms, Cu sub-unit cluster, and Q' sub-unit cell were almost the same, so that these structures should be the clusters of Q' phase. Since the areal density, length and diameter of precipitates were almost equal between Cu free Al-Mg-Si alloy and Cu added Al-Mg-Si alloy, the increase of hardness by Cu addition should be due to the precipitation of Cu related precipitates, such as Cu sub-unit clusters and Q' sub-unit cells.