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High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys

Author

Listed:
  • Yao-Jian Liang

    (Beijing Institute of Technology)

  • Linjing Wang

    (Beijing Institute of Technology)

  • Yuren Wen

    (Chinese Academy of Sciences)

  • Baoyuan Cheng

    (Beijing Institute of Technology)

  • Qinli Wu

    (Nanjing University of Science and Technology)

  • Tangqing Cao

    (Beijing Institute of Technology)

  • Qian Xiao

    (Beijing Institute of Technology)

  • Yunfei Xue

    (Beijing Institute of Technology)

  • Gang Sha

    (Nanjing University of Science and Technology)

  • Yandong Wang

    (University of Science and Technology Beijing)

  • Yang Ren

    (Argonne National Laboratory)

  • Xiaoyan Li

    (Tsinghua University)

  • Lu Wang

    (Beijing Institute of Technology)

  • Fuchi Wang

    (Beijing Institute of Technology)

  • Hongnian Cai

    (Beijing Institute of Technology)

Abstract

Precipitation-hardening high-entropy alloys (PH-HEAs) with good strength−ductility balances are a promising candidate for advanced structural applications. However, current HEAs emphasize near-equiatomic initial compositions, which limit the increase of intermetallic precipitates that are closely related to the alloy strength. Here we present a strategy to design ultrastrong HEAs with high-content nanoprecipitates by phase separation, which can generate a near-equiatomic matrix in situ while forming strengthening phases, producing a PH-HEA regardless of the initial atomic ratio. Accordingly, we develop a non-equiatomic alloy that utilizes spinodal decomposition to create a low-misfit coherent nanostructure combining a near-equiatomic disordered face-centered-cubic (FCC) matrix with high-content ductile Ni3Al-type ordered nanoprecipitates. We find that this spinodal order–disorder nanostructure contributes to a strength increase of ~1.5 GPa (>560%) relative to the HEA without precipitation, achieving one of the highest tensile strength (1.9 GPa) among all bulk HEAs reported previously while retaining good ductility (>9%).

Suggested Citation

  • Yao-Jian Liang & Linjing Wang & Yuren Wen & Baoyuan Cheng & Qinli Wu & Tangqing Cao & Qian Xiao & Yunfei Xue & Gang Sha & Yandong Wang & Yang Ren & Xiaoyan Li & Lu Wang & Fuchi Wang & Hongnian Cai, 2018. "High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06600-8
    DOI: 10.1038/s41467-018-06600-8
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    Cited by:

    1. Xingjia He & Yu Zhang & Xinlei Gu & Jiangwei Wang & Jinlei Qi & Jun Hao & Longpeng Wang & Hao Huang & Mao Wen & Kan Zhang & Weitao Zheng, 2023. "Pt-induced atomic-level tailoring towards paracrystalline high-entropy alloy," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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