Formation Behavior of Nanoclusters in AlMgSi Alloys with Different Mg and Si Concentration
Formation Behavior of Nanoclusters in AlMgSi Alloys with Different Mg and Si Concentration
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不同Mg、Si浓度AlMgSi合金中纳米团簇的形成行为
DOI：
10.2320/matertrans.mbw201208
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发表时间：
2013
影响因子：
1.2
通讯作者：
Tatsuo Sato
中科院分区：
文献类型：
--
作者：
SeongNyeong Kim;Jaehwan Kim;H. Tezuka;E. Kobayashi;Tatsuo Sato
采用差示扫描量热仪(DSC)、显微维氏硬度和电阻率测量等方法研究了不同镁、硅含量的Al-Mg-Si合金中纳米团簇的形成行为。在DSC结果中，不同镁和硅含量的合金中检测到两个放热峰，并用高斯函数法分离出两个放热峰，以分析簇合物(1)和簇合物(2)。结果表明，较高的Mg+Si含量和接近1.0的Mg/Si比有利于团簇(1)和团簇(2)的形成。特别是，根据硬度和电阻率的测量结果，建议将自然时效过程中团簇(1)的形成顺序划分为三个区域。这些结果表明，簇合物(1)的成分最初是富硅的，然后随着镁的掺入逐渐变得富镁。团簇(1)的生长速率不高，而团簇(2)的生长速率较高，组成为Mg/Si‘1.0。[DOI：10.2320/MATERTRAN.MBW201208]
In this paper, nanocluster formation behavior in AlMgSi alloys with different Mg and Si concentration was studied by differential scanning calorimetry (DSC), micro-Vickers hardness and electrical resistivity measurements. Two exothermic peaks were detected in the alloys with different Mg and Si concentration in the DSC results, and separated using the Gaussian function method in order to analyze the Cluster (1) and Cluster (2). It is found that both of Cluster (1) and Cluster (2) formation are enhanced with the higher Mg + Si and the Mg/Si ratio close to 1.0. Especially, it is suggested that the formation sequence of Cluster (1) during natural aging is classified into three regions from the results of hardness and electrical resistivity measurement. These results mean that the composition of Cluster (1) is initially Si-rich then gradually becomes enriched in Mg by the incorporation of Mg. The growth rate of Cluster (1) is not high, whereas of Cluster (2) is higher and the composition becomes Mg/Si ’ 1.0. [doi:10.2320/matertrans.MBW201208]