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High pressure synthesis of a hexagonal close-packed phase of the high-entropy alloy CrMnFeCoNi

Author

Listed:
  • Cameron L. Tracy

    (Stanford University)

  • Sulgiye Park

    (Stanford University)

  • Dylan R. Rittman

    (Stanford University)

  • Steven J. Zinkle

    (University of Tennessee
    University of Tennessee)

  • Hongbin Bei

    (Oak Ridge National Laboratory)

  • Maik Lang

    (University of Tennessee)

  • Rodney C. Ewing

    (Stanford University)

  • Wendy L. Mao

    (Stanford University
    Stanford Institute for Materials & Energy Sciences, SLAC National Accelerator Laboratory)

Abstract

High-entropy alloys, near-equiatomic solid solutions of five or more elements, represent a new strategy for the design of materials with properties superior to those of conventional alloys. However, their phase space remains constrained, with transition metal high-entropy alloys exhibiting only face- or body-centered cubic structures. Here, we report the high-pressure synthesis of a hexagonal close-packed phase of the prototypical high-entropy alloy CrMnFeCoNi. This martensitic transformation begins at 14 GPa and is attributed to suppression of the local magnetic moments, destabilizing the initial fcc structure. Similar to fcc-to-hcp transformations in Al and the noble gases, the transformation is sluggish, occurring over a range of >40 GPa. However, the behaviour of CrMnFeCoNi is unique in that the hcp phase is retained following decompression to ambient pressure, yielding metastable fcc-hcp mixtures. This demonstrates a means of tuning the structures and properties of high-entropy alloys in a manner not achievable by conventional processing techniques.

Suggested Citation

  • Cameron L. Tracy & Sulgiye Park & Dylan R. Rittman & Steven J. Zinkle & Hongbin Bei & Maik Lang & Rodney C. Ewing & Wendy L. Mao, 2017. "High pressure synthesis of a hexagonal close-packed phase of the high-entropy alloy CrMnFeCoNi," Nature Communications, Nature, vol. 8(1), pages 1-6, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15634
    DOI: 10.1038/ncomms15634
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    Cited by:

    1. Xizheng Wang & Yunhao Zhao & Gang Chen & Xinpeng Zhao & Chuan Liu & Soumya Sridar & Luis Fernando Ladinos Pizano & Shuke Li & Alexandra H. Brozena & Miao Guo & Hanlei Zhang & Yuankang Wang & Wei Xiong, 2022. "Ultrahigh-temperature melt printing of multi-principal element alloys," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Zongrui Pei & Shiteng Zhao & Martin Detrois & Paul D. Jablonski & Jeffrey A. Hawk & David E. Alman & Mark Asta & Andrew M. Minor & Michael C. Gao, 2023. "Theory-guided design of high-entropy alloys with enhanced strength-ductility synergy," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Wei Chen & Antoine Hilhorst & Georgios Bokas & Stéphane Gorsse & Pascal J. Jacques & Geoffroy Hautier, 2023. "A map of single-phase high-entropy alloys," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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