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Simultaneously enhancing the ultimate strength and ductility of high-entropy alloys via short-range ordering

Author

Listed:
  • Shuai Chen

    (A*STAR)

  • Zachary H. Aitken

    (A*STAR)

  • Subrahmanyam Pattamatta

    (City University of Hong Kong)

  • Zhaoxuan Wu

    (City University of Hong Kong)

  • Zhi Gen Yu

    (A*STAR)

  • David J. Srolovitz

    (The University of Hong Kong)

  • Peter K. Liaw

    (The University of Tennessee)

  • Yong-Wei Zhang

    (A*STAR)

Abstract

Simultaneously enhancing strength and ductility of metals and alloys has been a tremendous challenge. Here, we investigate a CoCuFeNiPd high-entropy alloy (HEA), using a combination of Monte Carlo method, molecular dynamic simulation, and density-functional theory calculation. Our results show that this HEA is energetically favorable to undergo short-range ordering (SRO), and the SRO leads to a pseudo-composite microstructure, which surprisingly enhances both the ultimate strength and ductility. The SRO-induced composite microstructure consists of three categories of clusters: face-center-cubic-preferred (FCCP) clusters, indifferent clusters, and body-center-cubic-preferred (BCCP) clusters, with the indifferent clusters playing the role of the matrix, the FCCP clusters serving as hard fillers to enhance the strength, while the BCCP clusters acting as soft fillers to increase the ductility. Our work highlights the importance of SRO in influencing the mechanical properties of HEAs and presents a fascinating route for designing HEAs to achieve superior mechanical properties.

Suggested Citation

  • Shuai Chen & Zachary H. Aitken & Subrahmanyam Pattamatta & Zhaoxuan Wu & Zhi Gen Yu & David J. Srolovitz & Peter K. Liaw & Yong-Wei Zhang, 2021. "Simultaneously enhancing the ultimate strength and ductility of high-entropy alloys via short-range ordering," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25264-5
    DOI: 10.1038/s41467-021-25264-5
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    Cited by:

    1. Soon-Gil Jung & Yoonseok Han & Jin Hee Kim & Rahmatul Hidayati & Jong-Soo Rhyee & Jung Min Lee & Won Nam Kang & Woo Seok Choi & Hye-Ran Jeon & Jaekwon Suk & Tuson Park, 2022. "High critical current density and high-tolerance superconductivity in high-entropy alloy thin films," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Vito Coviello & Denis Badocco & Paolo Pastore & Martina Fracchia & Paolo Ghigna & Alessandro Martucci & Daniel Forrer & Vincenzo Amendola, 2024. "Accurate prediction of the optical properties of nanoalloys with both plasmonic and magnetic elements," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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