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Extra plasticity governed by shear band deflection in gradient metallic glasses

Author

Listed:
  • Yao Tang

    (Zhejiang University
    Zhejiang University
    Zhejiang University)

  • Haofei Zhou

    (Zhejiang University
    Zhejiang University)

  • Haiming Lu

    (Zhejiang University)

  • Xiaodong Wang

    (Zhejiang University
    Zhejiang University)

  • Qingping Cao

    (Zhejiang University
    Zhejiang University)

  • Dongxian Zhang

    (Zhejiang University
    Zhejiang University
    Zhejiang University)

  • Wei Yang

    (Zhejiang University)

  • Jian-Zhong Jiang

    (Zhejiang University
    Zhejiang University)

Abstract

Inspired by gradient materials in nature, advanced engineering components with controlled structural gradients have attracted substantial research interests due to their exceptional combinations of properties. However, it remains challenging to generate structural gradients that penetrate through bulk materials, which is essential for achieving enhanced mechanical properties in metallic materials. Here, we report practical strategies to design controllable structural gradients in bulk metallic glasses (BMGs). By adjusting processing conditions, including holding time and/or controlling temperatures, of cryogenic thermal cycling and fast cooling, two different types of gradient metallic glasses (GMGs) with spatially gradient-distributed free volume contents can be synthesized. Both mechanical testing and atomistic simulations demonstrate that the spatial gradient can endow GMGs with extra plasticity. Such an enhanced mechanical property is governed by the gradient-induced deflection of shear deformation that fundamentally suppresses the unlimited shear localization on a straight plane that would be expected in BMGs without such a gradient.

Suggested Citation

  • Yao Tang & Haofei Zhou & Haiming Lu & Xiaodong Wang & Qingping Cao & Dongxian Zhang & Wei Yang & Jian-Zhong Jiang, 2022. "Extra plasticity governed by shear band deflection in gradient metallic glasses," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-29821-4
    DOI: 10.1038/s41467-022-29821-4
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    References listed on IDEAS

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    1. S. V. Ketov & Y. H. Sun & S. Nachum & Z. Lu & A. Checchi & A. R. Beraldin & H. Y. Bai & W. H. Wang & D. V. Louzguine-Luzgin & M. A. Carpenter & A. L. Greer, 2015. "Rejuvenation of metallic glasses by non-affine thermal strain," Nature, Nature, vol. 524(7564), pages 200-203, August.
    2. Yujie Wei & Yongqiang Li & Lianchun Zhu & Yao Liu & Xianqi Lei & Gang Wang & Yanxin Wu & Zhenli Mi & Jiabin Liu & Hongtao Wang & Huajian Gao, 2014. "Evading the strength–ductility trade-off dilemma in steel through gradient hierarchical nanotwins," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
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