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Lattice distortion enabling enhanced strength and plasticity in high entropy intermetallic alloy

Author

Listed:
  • H. Wang

    (Kowloon Tong)

  • P. Y. Yang

    (Academia Sinica)

  • W. J. Zhao

    (Kowloon Tong
    Central South University)

  • S. H. Ma

    (Kowloon Tong)

  • J. H. Hou

    (Southern University of Science and Technology)

  • Q. F. He

    (Kowloon Tong
    Shanghai Jiao Tong University)

  • C. L. Wu

    (Academia Sinica)

  • H. A. Chen

    (National Taipei University of Technology)

  • Q. Wang

    (Shanghai University)

  • Q. Cheng

    (Hunan University)

  • B. S. Guo

    (Kowloon Tong
    Jinan University)

  • J. C. Qiao

    (Northwestern Polytechnical University)

  • W. J. Lu

    (Southern University of Science and Technology)

  • S. J. Zhao

    (Kowloon Tong)

  • X. D. Xu

    (National Taipei University of Technology)

  • C. T. Liu

    (Kowloon Tong
    Kowloon Tong)

  • Y. Liu

    (Central South University)

  • C. W. Pao

    (Academia Sinica)

  • Y. Yang

    (Kowloon Tong
    Kowloon Tong)

Abstract

Intermetallic alloys have traditionally been characterized by their inherent brittleness due to their lack of sufficient slip systems and absence of strain hardening. However, here we developed a single-phase B2 high-entropy intermetallic alloy that is both strong and plastic. Unlike conventional intermetallics, this high-entropy alloy features a highly distorted crystalline lattice with complex chemical order, leading to multiple slip systems and high flow stress. In addition, the alloy exhibits a dynamic hardening mechanism triggered by dislocation gliding that preserves its strength across a wide range of temperatures. As a result, this high-entropy intermetallic circumvents precipitous thermal softening, with extensive plastic flows even at high homologous temperatures, outperforming a variety of both body-centered cubic and B2 alloys. These findings reveal a promising direction for the development of intermetallic alloys with broad engineering applications.

Suggested Citation

  • H. Wang & P. Y. Yang & W. J. Zhao & S. H. Ma & J. H. Hou & Q. F. He & C. L. Wu & H. A. Chen & Q. Wang & Q. Cheng & B. S. Guo & J. C. Qiao & W. J. Lu & S. J. Zhao & X. D. Xu & C. T. Liu & Y. Liu & C. W, 2024. "Lattice distortion enabling enhanced strength and plasticity in high entropy intermetallic alloy," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51204-0
    DOI: 10.1038/s41467-024-51204-0
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    References listed on IDEAS

    as
    1. Q. F. He & J. G. Wang & H. A. Chen & Z. Y. Ding & Z. Q. Zhou & L. H. Xiong & J. H. Luan & J. M. Pelletier & J. C. Qiao & Q. Wang & L. L. Fan & Y. Ren & Q. S. Zeng & C. T. Liu & C. W. Pao & D. J. Srolo, 2022. "A highly distorted ultraelastic chemically complex Elinvar alloy," Nature, Nature, vol. 602(7896), pages 251-257, February.
    2. Sheng Yin & Yunxing Zuo & Anas Abu-Odeh & Hui Zheng & Xiang-Guo Li & Jun Ding & Shyue Ping Ong & Mark Asta & Robert O. Ritchie, 2021. "Atomistic simulations of dislocation mobility in refractory high-entropy alloys and the effect of chemical short-range order," Nature Communications, Nature, vol. 12(1), pages 1-14, December.
    3. Q. Rizzardi & C. McElfresh & G. Sparks & D. D. Stauffer & J. Marian & R. Maaß, 2022. "Mild-to-wild plastic transition is governed by athermal screw dislocation slip in bcc Nb," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    4. Q. F. He & J. G. Wang & H. A. Chen & Z. Y. Ding & Z. Q. Zhou & L. H. Xiong & J. H. Luan & J. M. Pelletier & J. C. Qiao & Q. Wang & L. L. Fan & Y. Ren & Q. S. Zeng & C. T. Liu & C. W. Pao & D. J. Srolo, 2022. "Author Correction: A highly distorted ultraelastic chemically complex Elinvar alloy," Nature, Nature, vol. 603(7903), pages 32-32, March.
    5. Chanho Lee & Francesco Maresca & Rui Feng & Yi Chou & T. Ungar & Michael Widom & Ke An & Jonathan D. Poplawsky & Yi-Chia Chou & Peter K. Liaw & W. A. Curtin, 2021. "Strength can be controlled by edge dislocations in refractory high-entropy alloys," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
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