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Engineering atomic-level complexity in high-entropy and complex concentrated alloys

Author

Listed:
  • Hyun Seok Oh

    (Seoul National University)

  • Sang Jun Kim

    (Seoul National University)

  • Khorgolkhuu Odbadrakh

    (University of Tennessee and Oak Ridge National Laboratory
    National University of Mongolia)

  • Wook Ha Ryu

    (Seoul National University)

  • Kook Noh Yoon

    (Seoul National University)

  • Sai Mu

    (Oak Ridge National Laboratory)

  • Fritz Körmann

    (Max-Planck-Institut für Eisenforschung
    Delft University of Technology)

  • Yuji Ikeda

    (Max-Planck-Institut für Eisenforschung)

  • Cemal Cem Tasan

    (Massachusetts Institute of Technology)

  • Dierk Raabe

    (Max-Planck-Institut für Eisenforschung)

  • Takeshi Egami

    (Oak Ridge National Laboratory
    University of Tennessee)

  • Eun Soo Park

    (Seoul National University)

Abstract

Quantitative and well-targeted design of modern alloys is extremely challenging due to their immense compositional space. When considering only 50 elements for compositional blending the number of possible alloys is practically infinite, as is the associated unexplored property realm. In this paper, we present a simple property-targeted quantitative design approach for atomic-level complexity in complex concentrated and high-entropy alloys, based on quantum-mechanically derived atomic-level pressure approximation. It allows identification of the best suited element mix for high solid-solution strengthening using the simple electronegativity difference among the constituent elements. This approach can be used for designing alloys with customized properties, such as a simple binary NiV solid solution whose yield strength exceeds that of the Cantor high-entropy alloy by nearly a factor of two. This study provides general design rules that enable effective utilization of atomic level information to reduce the immense degrees of freedom in compositional space without sacrificing physics-related plausibility.

Suggested Citation

  • Hyun Seok Oh & Sang Jun Kim & Khorgolkhuu Odbadrakh & Wook Ha Ryu & Kook Noh Yoon & Sai Mu & Fritz Körmann & Yuji Ikeda & Cemal Cem Tasan & Dierk Raabe & Takeshi Egami & Eun Soo Park, 2019. "Engineering atomic-level complexity in high-entropy and complex concentrated alloys," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10012-7
    DOI: 10.1038/s41467-019-10012-7
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    Cited by:

    1. Hyun Chung & Won Seok Choi & Hosun Jun & Hyeon-Seok Do & Byeong-Joo Lee & Pyuck-Pa Choi & Heung Nam Han & Won-Seok Ko & Seok Su Sohn, 2023. "Doubled strength and ductility via maraging effect and dynamic precipitate transformation in ultrastrong medium-entropy alloy," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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