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Hierarchical nanostructured aluminum alloy with ultrahigh strength and large plasticity

Author

Listed:
  • Ge Wu

    (City University of Hong Kong)

  • Chang Liu

    (City University of Hong Kong)

  • Ligang Sun

    (Harbin Institute of Technology
    City University of Hong Kong)

  • Qing Wang

    (City University of Hong Kong
    Institute of Materials Science, Shanghai University)

  • Baoan Sun

    (Institute of Physics, Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Bin Han

    (City University of Hong Kong)

  • Ji-Jung Kai

    (City University of Hong Kong)

  • Junhua Luan

    (City University of Hong Kong)

  • Chain Tsuan Liu

    (City University of Hong Kong
    City University of Hong Kong
    City University of Hong Kong)

  • Ke Cao

    (City University of Hong Kong)

  • Yang Lu

    (City University of Hong Kong
    City University of Hong Kong)

  • Lizi Cheng

    (City University of Hong Kong)

  • Jian Lu

    (City University of Hong Kong
    City University of Hong Kong
    City University of Hong Kong
    Shenzhen Research Institute of City University of Hong Kong)

Abstract

High strength and high ductility are often mutually exclusive properties for structural metallic materials. This is particularly important for aluminum (Al)-based alloys which are widely commercially employed. Here, we introduce a hierarchical nanostructured Al alloy with a structure of Al nanograins surrounded by nano-sized metallic glass (MG) shells. It achieves an ultrahigh yield strength of 1.2 GPa in tension (1.7 GPa in compression) along with 15% plasticity in tension (over 70% in compression). The nano-sized MG phase facilitates such ultrahigh strength by impeding dislocation gliding from one nanograin to another, while continuous generation-movement-annihilation of dislocations in the Al nanograins and the flow behavior of the nano-sized MG phase result in increased plasticity. This plastic deformation mechanism is also an efficient way to decrease grain size to sub-10 nm size for low melting temperature metals like Al, making this structural design one solution to the strength-plasticity trade-off.

Suggested Citation

  • Ge Wu & Chang Liu & Ligang Sun & Qing Wang & Baoan Sun & Bin Han & Ji-Jung Kai & Junhua Luan & Chain Tsuan Liu & Ke Cao & Yang Lu & Lizi Cheng & Jian Lu, 2019. "Hierarchical nanostructured aluminum alloy with ultrahigh strength and large plasticity," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13087-4
    DOI: 10.1038/s41467-019-13087-4
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    Cited by:

    1. Ge Wu & Sida Liu & Qing Wang & Jing Rao & Wenzhen Xia & Yong-Qiang Yan & Jürgen Eckert & Chang Liu & En Ma & Zhi-Wei Shan, 2023. "Substantially enhanced homogeneous plastic flow in hierarchically nanodomained amorphous alloys," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Ge Wu & Chang Liu & Yong-Qiang Yan & Sida Liu & Xinyu Ma & Shengying Yue & Zhi-Wei Shan, 2024. "Elemental partitioning-mediated crystalline-to-amorphous phase transformation under quasi-static deformation," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Xingjia He & Yu Zhang & Xinlei Gu & Jiangwei Wang & Jinlei Qi & Jun Hao & Longpeng Wang & Hao Huang & Mao Wen & Kan Zhang & Weitao Zheng, 2023. "Pt-induced atomic-level tailoring towards paracrystalline high-entropy alloy," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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