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Volume 25 Issue 1
Jan.  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(1): 62-72
Li-zi He, Yi-heng Cao, Yi-zhou Zhou, and Jian-zhong Cui, Effects of Ag addition on the microstructures and properties of Al-Mg-Si-Cu alloys, Int. J. Miner. Metall. Mater., 25(2018), No. 1, pp. 62-72. https://doi.org/10.1007/s12613-018-1547-1
Cite this article as:
Li-zi He, Yi-heng Cao, Yi-zhou Zhou, and Jian-zhong Cui, Effects of Ag addition on the microstructures and properties of Al-Mg-Si-Cu alloys, Int. J. Miner. Metall. Mater., 25(2018), No. 1, pp. 62-72. https://doi.org/10.1007/s12613-018-1547-1
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研究论文

Effects of Ag addition on the microstructures and properties of Al-Mg-Si-Cu alloys

  • Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China

  • School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China

  • Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

  • 通讯作者:

    Li-zi He    E-mail: helizi@epm.neu.edu.cn

  • Effects of Ag addition on the microstructures, aging characteristics, tensile properties, electrochemical properties, and intergranular corrosion (IGC) properties of Al-1.1Mg-0.8Si-0.9Cu-0.35Mn-0.02Ti alloy were investigated using scanning electronic microscopy and transmission electronic microscopy. The aging process of Al-Mg-Si-Cu alloys was accelerated by the addition of Ag. The strength of peak-aged Al-Mg-Si-Cu alloys was enhanced by Ag addition because of the high density of β"- and L-phase age-hardening precipitates. The corrosion performance of the Al-Mg-Si-Cu alloy is closely related to the aging conditions and is independent of the Ag content. The IGC susceptibility is serious in the peak-aged alloy because of the continuous distribution of Cu-rich Q-phase precipitates along grain boundaries. Ag addition reduces the size of the grain-boundary-precipitate Q phase and the width of the precipitate-free zone and thus results in decreased IGC susceptibility of Al-Mg-Si-Cu alloys.
    • Research Article

    Effects of Ag addition on the microstructures and properties of Al-Mg-Si-Cu alloys

    + Author Affiliations
      Abstract
    • Effects of Ag addition on the microstructures, aging characteristics, tensile properties, electrochemical properties, and intergranular corrosion (IGC) properties of Al-1.1Mg-0.8Si-0.9Cu-0.35Mn-0.02Ti alloy were investigated using scanning electronic microscopy and transmission electronic microscopy. The aging process of Al-Mg-Si-Cu alloys was accelerated by the addition of Ag. The strength of peak-aged Al-Mg-Si-Cu alloys was enhanced by Ag addition because of the high density of β"- and L-phase age-hardening precipitates. The corrosion performance of the Al-Mg-Si-Cu alloy is closely related to the aging conditions and is independent of the Ag content. The IGC susceptibility is serious in the peak-aged alloy because of the continuous distribution of Cu-rich Q-phase precipitates along grain boundaries. Ag addition reduces the size of the grain-boundary-precipitate Q phase and the width of the precipitate-free zone and thus results in decreased IGC susceptibility of Al-Mg-Si-Cu alloys.
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