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Unstable twin in body-centered cubic tungsten nanocrystals

Author

Listed:
  • Xiang Wang

    (University of Pittsburgh)

  • Jiangwei Wang

    (University of Pittsburgh
    Zhejiang University)

  • Yang He

    (University of Pittsburgh)

  • Chongmin Wang

    (Pacific Northwest National Laboratory)

  • Li Zhong

    (University of Pittsburgh)

  • Scott X. Mao

    (University of Pittsburgh)

Abstract

Twinning is commonly activated in plastic deformation of low stacking-fault face-centered cubic (Fcc) metals but rarely found in body-centered cubic (Bcc) metals under room temperature and slow strain rates. Here, by conducting in situ transmission electron microscopy (TEM) at atomic scale, we discover that, in stark contrast to those in most Fcc metals, a majority of deformation twins in Bcc metals are unstable and undergo spontaneously detwinning upon unloading. Such unexpected instability of Bcc twins is found to be closely related to the prevalence of the inclined twin boundaries—a peculiar structure where twin boundaries are not parallel to the twinning plane, and the degree of instability is in direct proportion to the fraction of the inclined twin boundary. This work provides significant insights into the structure and stability of deformation twins in Bcc metals.

Suggested Citation

  • Xiang Wang & Jiangwei Wang & Yang He & Chongmin Wang & Li Zhong & Scott X. Mao, 2020. "Unstable twin in body-centered cubic tungsten nanocrystals," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16349-8
    DOI: 10.1038/s41467-020-16349-8
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    Cited by:

    1. Tong Li & Tianwei Liu & Shiteng Zhao & Yan Chen & Junhua Luan & Zengbao Jiao & Robert O. Ritchie & Lanhong Dai, 2023. "Ultra-strong tungsten refractory high-entropy alloy via stepwise controllable coherent nanoprecipitations," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Li Zhong & Yin Zhang & Xiang Wang & Ting Zhu & Scott X. Mao, 2024. "Atomic-scale observation of nucleation- and growth-controlled deformation twinning in body-centered cubic nanocrystals," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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