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Synergistic Balance of Strength and Corrosion Resistance in Al–Mg–Er Alloys

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

High-strength, corrosion-resistant, and lightweight Al–Mg alloys perform an important function in harsh coastal service environments. Corrosion resistance is generally inversely correlated with strength; hence, it is difficult to simultaneously optimize both. In this study, a low-magnesium Er-containing Al-based alloy that is stronger and more corrosion resistant than Al-based alloys have been reported. The alloy contains Er, and the precipitation of Al3Er within a face-centered cubic matrix is obtained by a series of smelting–casting, heat treatment, and rolling processes. It is presumed that the strengthening phase of Al3Er pinning dislocations improves alloy strength. It also increases the recrystallization temperature of cold-rolled matrix and induces the distribution of small-angle grain boundaries, thus allowing the alloy to achieve excellent environmental corrosion resistance. As a result, strength and corrosion resistance are simultaneously improved.

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Acknowledgements

The work was financially supported by the National Natural Science Foundation of China (Nos. U1860206, 51601011, 51874023), the Fundamental Research Funds for the Central Universities (No. FRF-TP-18-003B1), the Recruitment Program of Global Experts, the State Grid Scientific and Technological Research Program of China (No. 5211DS17001X).

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Authors and Affiliations

  1. Zhejing Electric Power Corporation Research Institute, Hangzhou, 310014, China

    Haifei Zhou & Zhouhai Qian

  2. State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Mengcheng Zhou, Xuebing Liu, Yong Li & Xinfang Zhang

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  1. Haifei Zhou
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  2. Zhouhai Qian
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  3. Mengcheng Zhou
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  4. Xuebing Liu
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  6. Xinfang Zhang
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Correspondence to Xinfang Zhang.

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Available online at https://link.springer.com/journal/40195.

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Zhou, H., Qian, Z., Zhou, M. et al. Synergistic Balance of Strength and Corrosion Resistance in Al–Mg–Er Alloys. Acta Metall. Sin. (Engl. Lett.) 33, 659–670 (2020). https://doi.org/10.1007/s40195-020-01007-1

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  • DOI: https://doi.org/10.1007/s40195-020-01007-1

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