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Phase-selective recrystallization makes eutectic high-entropy alloys ultra-ductile

Author

Listed:
  • Qingfeng Wu

    (Northwestern Polytechnical University)

  • Feng He

    (Northwestern Polytechnical University)

  • Junjie Li

    (Northwestern Polytechnical University)

  • Hyoung Seop Kim

    (Pohang University of Science and Technology (POSTECH)
    Tohoku University)

  • Zhijun Wang

    (Northwestern Polytechnical University)

  • Jincheng Wang

    (Northwestern Polytechnical University)

Abstract

Excellent ductility is crucial not only for shaping but also for strengthening metals and alloys. The ever most widely used eutectic alloys are suffering from the limited ductility and losing competitiveness among advanced structural materials. Here we report a distinctive concept of phase-selective recrystallization to overcome this challenge for eutectic alloys by triggering the strain hardening capacity of the duplex phases completely. We manipulate the strain partitioning behavior of the two phases in a eutectic high-entropy alloy (EHEA) to obtain the phase-selectively recrystallized microstructure with a fully recrystallized soft phase embedded in the skeleton of a hard phase. The resulting microstructure fully releases the strain hardening capacity in EHEA by eliminating the weak boundaries. Our phase-selectively recrystallized EHEA achieves a high ductility of ∼35% uniform elongation with true stress of ∼2 GPa. This concept is universal for various duplex alloys with soft and hard phases and opens new frontiers for traditional eutectic alloys as high-strength metallic materials.

Suggested Citation

  • Qingfeng Wu & Feng He & Junjie Li & Hyoung Seop Kim & Zhijun Wang & Jincheng Wang, 2022. "Phase-selective recrystallization makes eutectic high-entropy alloys ultra-ductile," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32444-4
    DOI: 10.1038/s41467-022-32444-4
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    1. Suihe Jiang & Hui Wang & Yuan Wu & Xiongjun Liu & Honghong Chen & Mengji Yao & Baptiste Gault & Dirk Ponge & Dierk Raabe & Akihiko Hirata & Mingwei Chen & Yandong Wang & Zhaoping Lu, 2017. "Ultrastrong steel via minimal lattice misfit and high-density nanoprecipitation," Nature, Nature, vol. 544(7651), pages 460-464, April.
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    Cited by:

    1. Wuyang Ren & Wenhua Xue & Shuping Guo & Ran He & Liangzi Deng & Shaowei Song & Andrei Sotnikov & Kornelius Nielsch & Jeroen Brink & Guanhui Gao & Shuo Chen & Yimo Han & Jiang Wu & Ching-Wu Chu & Zhimi, 2023. "Vacancy-mediated anomalous phononic and electronic transport in defective half-Heusler ZrNiBi," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Yao Tang & Haikuo Wang & Xiaoping Ouyang & Chao Wang & Qishan Huang & Qingkun Zhao & Xiaochun Liu & Qi Zhu & Zhiqiang Hou & Jiakun Wu & Zhicai Zhang & Hao Li & Yikan Yang & Wei Yang & Huajian Gao & Ha, 2024. "Overcoming strength-ductility tradeoff with high pressure thermal treatment," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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