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Effect of Mg Content on the Microstructure and Corrosion Properties of Al-Cu-Mn Alloy

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Abstract

In this paper, the effect of Mg content on the microstructure and properties of Al-Cu-Mn alloy was investigated. The microstructures and the mechanical properties of the alloys were studied by scanning electron microscopy and transmission electron microscopy, and Vickers hardness measurement, respectively. Furthermore, the effect of Mg content on the corrosion resistance of the alloys was explored by exfoliation corrosion test, intergranular corrosion test, and electrochemical techniques. The results show that the overall properties of Al-Cu-Mn alloy with 0.1 wt.% Mg are superior to other alloys. Specifically, the Vickers hardness of this alloy reaches 111.45 HV. The grating of exfoliation corrosion is EA, and the intergranular corrosion depth is 30.2 μm. It is believed that the improved mechanical properties and corrosion resistance of the Al-Cu-Mn alloy with 0.1 wt.% Mg result from the S phase formed in the alloy and the highly dispersive distribution of the θ phase.

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Acknowledgments

This research was financially supported by the Program for National Key Research and Development Plan (2017YFB1104000), National Natural Science Foundation of China (51574167) and Doctoral Scientific Research Foundation of Liaoning Province (20170520337).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China

    Ruiming Su, Kaining Wang, Yuping Yang, Yingdong Qu & Rongde Li

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  1. Ruiming Su
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Su, R., Wang, K., Yang, Y. et al. Effect of Mg Content on the Microstructure and Corrosion Properties of Al-Cu-Mn Alloy. J. of Materi Eng and Perform 29, 1622–1629 (2020). https://doi.org/10.1007/s11665-020-04684-2

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