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Divergent evolution of slip banding in CrCoNi alloys

Author

Listed:
  • Bijun Xie

    (University of California)

  • Hangman Chen

    (University of California)

  • Pengfei Wang

    (University of California)

  • Cheng Zhang

    (University of California)

  • Bin Xing

    (University of California)

  • Mingjie Xu

    (University of California)

  • Xin Wang

    (University of California)

  • Lorenzo Valdevit

    (University of California
    University of California)

  • Julian Rimoli

    (University of California)

  • Xiaoqing Pan

    (University of California)

  • Penghui Cao

    (University of California
    University of California)

Abstract

Metallic materials under high stress often exhibit deformation localization, manifesting as slip banding. Over seven decades ago, Frank and Read introduced the well-known model of dislocation multiplication at a source, explaining slip band formation. Here, we reveal two distinct types of slip bands (confined and extended) in compressed CrCoNi alloys through multi-scale testing and modeling from microscopic to atomic scales. The confined slip band, characterized by a thin glide zone, arises from the conventional process of repetitive full dislocation emissions at Frank–Read source. Contrary to the classical model, the extended band stems from slip-induced deactivation of dislocation sources, followed by consequent generation of new sources on adjacent planes, leading to rapid band thickening. Our findings provide insights into atomic-scale collective dislocation motion and microscopic deformation instability in advanced structural materials.

Suggested Citation

  • Bijun Xie & Hangman Chen & Pengfei Wang & Cheng Zhang & Bin Xing & Mingjie Xu & Xin Wang & Lorenzo Valdevit & Julian Rimoli & Xiaoqing Pan & Penghui Cao, 2025. "Divergent evolution of slip banding in CrCoNi alloys," Nature Communications, Nature, vol. 16(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-58480-4
    DOI: 10.1038/s41467-025-58480-4
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