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Enhancing fatigue life by ductile-transformable multicomponent B2 precipitates in a high-entropy alloy

Author

Listed:
  • Rui Feng

    (The University of Tennessee
    Oak Ridge National Laboratory)

  • You Rao

    (The Ohio State University)

  • Chuhao Liu

    (Shanghai Jiao Tong University)

  • Xie Xie

    (The University of Tennessee)

  • Dunji Yu

    (Oak Ridge National Laboratory)

  • Yan Chen

    (Oak Ridge National Laboratory)

  • Maryam Ghazisaeidi

    (The Ohio State University)

  • Tamas Ungar

    (Eötvös University Budapest)

  • Huamiao Wang

    (Shanghai Jiao Tong University)

  • Ke An

    (Oak Ridge National Laboratory)

  • Peter. K. Liaw

    (The University of Tennessee)

Abstract

Catastrophic accidents caused by fatigue failures often occur in engineering structures. Thus, a fundamental understanding of cyclic-deformation and fatigue-failure mechanisms is critical for the development of fatigue-resistant structural materials. Here we report a high-entropy alloy with enhanced fatigue life by ductile-transformable multicomponent B2 precipitates. Its cyclic-deformation mechanisms are revealed by real-time in-situ neutron diffraction, transmission-electron microscopy, crystal-plasticity modeling, and Monte-Carlo simulations. Multiple cyclic-deformation mechanisms, including dislocation slips, precipitation strengthening, deformation twinning, and reversible martensitic phase transformation, are observed in the studied high-entropy alloy. Its improved fatigue performance at low strain amplitudes, i.e., the high fatigue-crack-initiation resistance, is attributed to the high elasticity, plastic deformability, and martensitic transformation of the B2-strengthening phase. This study shows that fatigue-resistant alloys can be developed by incorporating strengthening ductile-transformable multicomponent intermetallic phases.

Suggested Citation

  • Rui Feng & You Rao & Chuhao Liu & Xie Xie & Dunji Yu & Yan Chen & Maryam Ghazisaeidi & Tamas Ungar & Huamiao Wang & Ke An & Peter. K. Liaw, 2021. "Enhancing fatigue life by ductile-transformable multicomponent B2 precipitates in a high-entropy alloy," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23689-6
    DOI: 10.1038/s41467-021-23689-6
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    Cited by:

    1. Tong Li & Tianwei Liu & Shiteng Zhao & Yan Chen & Junhua Luan & Zengbao Jiao & Robert O. Ritchie & Lanhong Dai, 2023. "Ultra-strong tungsten refractory high-entropy alloy via stepwise controllable coherent nanoprecipitations," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Punit Kumar & Sheng Huang & David H. Cook & Kai Chen & Upadrasta Ramamurty & Xipeng Tan & Robert O. Ritchie, 2024. "A strong fracture-resistant high-entropy alloy with nano-bridged honeycomb microstructure intrinsically toughened by 3D-printing," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Bo Xiao & Junhua Luan & Shijun Zhao & Lijun Zhang & Shiyao Chen & Yilu Zhao & Lianyong Xu & C. T. Liu & Ji-Jung Kai & Tao Yang, 2022. "Achieving thermally stable nanoparticles in chemically complex alloys via controllable sluggish lattice diffusion," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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