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Near-ideal theoretical strength in gold nanowires containing angstrom scale twins

Author

Listed:
  • Jiangwei Wang

    (University of Pittsburgh, 3700 O’Hara Street)

  • Frederic Sansoz

    (Mechanical Engineering and Materials Science Programs, School of Engineering, The University of Vermont)

  • Jianyu Huang

    (Center for Integrated Nanotechnologies, Sandia National Laboratories)

  • Yi Liu

    (Brown University)

  • Shouheng Sun

    (Brown University)

  • Ze Zhang

    (Zhejiang University)

  • Scott X. Mao

    (University of Pittsburgh, 3700 O’Hara Street)

Abstract

Although nanoscale twinning is an effective means to enhance yield strength and tensile ductility in metals, nanotwinned metals generally fail well below their theoretical strength limit due to heterogeneous dislocation nucleation from boundaries or surface imperfections. Here we show that Au nanowires containing angstrom-scaled twins (0.7 nm in thickness) exhibit tensile strengths up to 3.12 GPa, near the ideal limit, with a remarkable ductile-to-brittle transition with decreasing twin size. This is opposite to the behaviour of metallic nanowires with lower-density twins reported thus far. Ultrahigh-density twins (twin thickness

Suggested Citation

  • Jiangwei Wang & Frederic Sansoz & Jianyu Huang & Yi Liu & Shouheng Sun & Ze Zhang & Scott X. Mao, 2013. "Near-ideal theoretical strength in gold nanowires containing angstrom scale twins," Nature Communications, Nature, vol. 4(1), pages 1-8, June.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2768
    DOI: 10.1038/ncomms2768
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    Cited by:

    1. Qian Zhang & Ranming Niu & Ying Liu & Jiaxi Jiang & Fan Xu & Xuan Zhang & Julie M. Cairney & Xianghai An & Xiaozhou Liao & Huajian Gao & Xiaoyan Li, 2023. "Room-temperature super-elongation in high-entropy alloy nanopillars," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Chengpeng Yang & Bozhao Zhang & Libo Fu & Zhanxin Wang & Jiao Teng & Ruiwen Shao & Ziqi Wu & Xiaoxue Chang & Jun Ding & Lihua Wang & Xiaodong Han, 2023. "Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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