Effect of Additional Elements (Cu, Ag) on Precipitation in 6xxx (Al-Mg-Si) Alloys
Effect of Additional Elements (Cu, Ag) on Precipitation in 6xxx (Al-Mg-Si) Alloys
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添加元素（Cu、Ag）对 6xxx (Al-Mg-Si) 合金中析出的影响
DOI：
10.4028/www.scientific.net/msf.706-709.357
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
R. Holmestad
中科院分区：
文献类型：
--
作者：
K. Matsuda;J. Nakamura;T. Kawabata;S. Ikeno;Tatsuo Sato;C. Marioara;S. Andersen;R. Holmestad
已知添加铜或银的Al-1.0质量%镁硅(平衡)合金比无铜或无银的平衡合金具有更高的硬度和延伸率。本文通过硬度、拉伸试验和高分辨电子显微镜观察，研究了添加铜或银的合金和硅镁比过高的合金。添加铜对提高硬度是有效的，添加银有利于提高峰值时效样品的延伸率。用高分辨电子显微镜证实了这些合金在峰值时效时的析出物。加铜合金中几乎含有q‘相，加银合金中含有b’相。用HRTEM、SAED和EDS研究了添加银或铜的Al-Mg-Si合金的析出过程。通过HRTEM图像和SAED图谱对两种合金中的析出相进行了分类。还研究了析出相的相对频率，并与合金中的相对频率进行了比较。
It has been known that Cu- or Ag-addition Al-1.0mass%Mg2Si (balanced) alloys shows higher hardness and elongation than Cu-free or Ag-free balance alloy. In this study, the alloys with Cu or Ag addition and the alloys with Si / Mg in excess have been investigated by hardness and tensile tests and HRTEM observation. Cu addition is effective for higher hardness, and Ag-addition is useful for improvement of elongation for peak-aged samples. Precipitates in peak aged these alloys have been confirmed by HRTEM. Cu-addition alloy almost includes Q’-phase, and Ag-addition alloy includes b’-phase. The precipitation sequence of Ag- or Cu addition Al-Mg-Si alloy was investigated using HRTEM, SAED, and EDS. The precipitates obtained in the two alloys were classified into several kinds by HRTEM images and SAED patterns. The relative frequencies of precipitates were also investigated and compared with that in the alloy.