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Volume 26 Issue 2
Feb.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(2): 241-250
Cheng-bin Cai, Xiao-jing Xu, Jin-dong Huang, Shi-hao Ju, Qing Ding, and Cheng-song Wang, Effect of pre-recovery on microstructure and properties of rolled Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr aluminum alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 2, pp. 241-250. https://doi.org/10.1007/s12613-019-1729-5
Cite this article as:
Cheng-bin Cai, Xiao-jing Xu, Jin-dong Huang, Shi-hao Ju, Qing Ding, and Cheng-song Wang, Effect of pre-recovery on microstructure and properties of rolled Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr aluminum alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 2, pp. 241-250. https://doi.org/10.1007/s12613-019-1729-5
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研究论文

Effect of pre-recovery on microstructure and properties of rolled Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr aluminum alloy

  • Engineering Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, Zhenjiang 212013, China

  • 通讯作者:

    Xiao-jing Xu    E-mail: xjxu67@126.com

  • The independently designed and manufactured ultra-high-strength aluminum alloy Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr was investigated via scanning electron microscopy observations, X-ray diffraction analysis, hardness tests, electrical conductivity tests, tensile tests, intergranular corrosion tests, and exfoliation corrosion tests. The effect of pre-recovery on the microstructure and mechanical properties of this aluminum alloy was also studied. The results show that the pre-recovery heat treatment releases deformation energy, inhibits recrystallization, and decreases the dislocation density. Although the pre-recovery heat treatment has little effect on the hardness, electrical conductivity, and elongation of this aluminum alloy, it can dramatically improve the alloy's tensile strength (the maximum tensile strength increased from 785.0 MPa to 809.2 MPa). Moreover, the tensile properties of this aluminum alloy have a certain degree of isotropy, and the pre-recovery heat treatment does not affect this property. In addition, the rolled aluminum alloy exhibits good corrosion resistance, but the effect of the pre-recovery heat treatment on the alloy's resistance to intergranular and exfoliation corrosion is negligible.
    • Research Article

    Effect of pre-recovery on microstructure and properties of rolled Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr aluminum alloy

    + Author Affiliations
      Abstract
    • The independently designed and manufactured ultra-high-strength aluminum alloy Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr was investigated via scanning electron microscopy observations, X-ray diffraction analysis, hardness tests, electrical conductivity tests, tensile tests, intergranular corrosion tests, and exfoliation corrosion tests. The effect of pre-recovery on the microstructure and mechanical properties of this aluminum alloy was also studied. The results show that the pre-recovery heat treatment releases deformation energy, inhibits recrystallization, and decreases the dislocation density. Although the pre-recovery heat treatment has little effect on the hardness, electrical conductivity, and elongation of this aluminum alloy, it can dramatically improve the alloy's tensile strength (the maximum tensile strength increased from 785.0 MPa to 809.2 MPa). Moreover, the tensile properties of this aluminum alloy have a certain degree of isotropy, and the pre-recovery heat treatment does not affect this property. In addition, the rolled aluminum alloy exhibits good corrosion resistance, but the effect of the pre-recovery heat treatment on the alloy's resistance to intergranular and exfoliation corrosion is negligible.
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