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Optimized Combinatorial Properties of an AlMgSi(Cu) Alloy Achieved by a Mechanical–Thermal Combinatorial Process

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Enhancing combinatorial properties, such as excellent corrosion resistance, high strength and good ductility combined, is an important issue for manufacturing high-quality AlMgSi(Cu) alloys. Here, we show that this can be achieved by optimizing a combinatorial process consisting of pre-ageing, cold-rolling and post-ageing to tailor the hierarchical microstructures of the alloy. Transmission electron microscopy analysis reveals that the enhanced combinatorial properties of corrosion resistance, strength and ductility are owing to modification of grain boundary microstructure in good association with changes of precipitate microstructures and a more homogenous distribution of solute atoms, as compared with the microstructures of the alloy processed by thermal ageing only.

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Acknowledgements

This work is supported by the National Key Research and Development Program of China (No. 2016YFB0300801) and the National Natural Science Foundation of China (Nos. 51471067, 11427806 and 51671082).

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Authors and Affiliations

  1. Center for High-Resolution Electron Microscopy, College of Materials Science & Engineering, Hunan University, Changsha, 410082, China

    Li-Mei Liu, Yu-Xiang Lai, Chun-Hui Liu & Jiang-Hua Chen

  2. Hunan Province Key Laboratory for Spray Deposition Technology and Application, Hunan University, Changsha, 410082, China

    Jiang-Hua Chen

Authors
  1. Li-Mei Liu
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  2. Yu-Xiang Lai
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  3. Chun-Hui Liu
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  4. Jiang-Hua Chen
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Correspondence to Jiang-Hua Chen.

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Liu, LM., Lai, YX., Liu, CH. et al. Optimized Combinatorial Properties of an AlMgSi(Cu) Alloy Achieved by a Mechanical–Thermal Combinatorial Process. Acta Metall. Sin. (Engl. Lett.) 33, 751–758 (2020). https://doi.org/10.1007/s40195-018-0818-1

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  • DOI: https://doi.org/10.1007/s40195-018-0818-1

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