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Volume 26 Issue 12
Dec.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(12): 1559-1569
Chong-yu Liu, Guang-biao Teng, Zong-yi Ma, Li-li Wei, Bing Zhang, and Yong Chen, Effects of Sc and Zr microalloying on the microstructure and mechanical properties of high Cu content 7xxx Al alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 12, pp. 1559-1569. https://doi.org/10.1007/s12613-019-1840-7
Cite this article as:
Chong-yu Liu, Guang-biao Teng, Zong-yi Ma, Li-li Wei, Bing Zhang, and Yong Chen, Effects of Sc and Zr microalloying on the microstructure and mechanical properties of high Cu content 7xxx Al alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 12, pp. 1559-1569. https://doi.org/10.1007/s12613-019-1840-7
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研究论文

Effects of Sc and Zr microalloying on the microstructure and mechanical properties of high Cu content 7xxx Al alloy

  • College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China

  • Guangdong JMA Aluminum Profile Factory (Group) Co., Ltd., Foshan 528200, China

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

  • State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China

  • 通讯作者:

    Chong-yu Liu    E-mail: lcy261@glut.edu.cn

    Zong-yi Ma    E-mail: zyma@imr.ac.cn

  • The effects of Sc and Zr microalloying on the microstructure and mechanical properties of a 7xxx Al alloy with high Cu content (7055) during casting, deformation, and heat treatment were investigated. The addition of Sc and Zr not only refined the grains but also transformed the θ-phase into the W-phase in the 7055 alloy. Minor Sc and Zr additions enhanced the hardness and yield strength of the 7055-T6 alloy by strengthening the grain boundaries and Al3(Sc,Zr) precipitates. However, a further increase in the Sc and Zr fractions did not refine the grains but instead resulted in the formation of the large-sized W-phase and primary coarse Al3(Sc,Zr) phase and subsequently deteriorated the mechanical properties of the alloys. The 7055 alloy with 0.25Sc addition exhibited the best mechanical property among the prepared alloys.
    • Research Article

    Effects of Sc and Zr microalloying on the microstructure and mechanical properties of high Cu content 7xxx Al alloy

    + Author Affiliations
      Abstract
    • The effects of Sc and Zr microalloying on the microstructure and mechanical properties of a 7xxx Al alloy with high Cu content (7055) during casting, deformation, and heat treatment were investigated. The addition of Sc and Zr not only refined the grains but also transformed the θ-phase into the W-phase in the 7055 alloy. Minor Sc and Zr additions enhanced the hardness and yield strength of the 7055-T6 alloy by strengthening the grain boundaries and Al3(Sc,Zr) precipitates. However, a further increase in the Sc and Zr fractions did not refine the grains but instead resulted in the formation of the large-sized W-phase and primary coarse Al3(Sc,Zr) phase and subsequently deteriorated the mechanical properties of the alloys. The 7055 alloy with 0.25Sc addition exhibited the best mechanical property among the prepared alloys.
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