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Switching nanoprecipitates to resist hydrogen embrittlement in high-strength aluminum alloys

Author

Listed:
  • Yafei Wang

    (Kyushu University
    Xi’an Jiaotong University)

  • Bhupendra Sharma

    (Kyushu University)

  • Yuantao Xu

    (Kyushu University
    Shanghai Jiao Tong University)

  • Kazuyuki Shimizu

    (Iwate University)

  • Hiro Fujihara

    (Kyushu University)

  • Kyosuke Hirayama

    (Kyoto University)

  • Akihisa Takeuchi

    (Japan Synchrotron Radiation Research Institute)

  • Masayuki Uesugi

    (Japan Synchrotron Radiation Research Institute)

  • Guangxu Cheng

    (Xi’an Jiaotong University)

  • Hiroyuki Toda

    (Kyushu University)

Abstract

Hydrogen drastically embrittles high-strength aluminum alloys, which impedes efforts to develop ultrastrong components in the aerospace and transportation industries. Understanding and utilizing the interaction of hydrogen with core strengthening elements in aluminum alloys, particularly nanoprecipitates, are critical to break this bottleneck. Herein, we show that hydrogen embrittlement of aluminum alloys can be largely suppressed by switching nanoprecipitates from the η phase to the T phase without changing the overall chemical composition. The T phase strongly traps hydrogen and resists hydrogen-assisted crack growth, with a more than 60% reduction in the areal fractions of cracks. The T phase-induced reduction in the concentration of hydrogen at defects and interfaces, which facilitates crack growth, primarily contributes to the suppressed hydrogen embrittlement. Transforming precipitates into strong hydrogen traps is proven to be a potential mitigation strategy for hydrogen embrittlement in aluminum alloys.

Suggested Citation

  • Yafei Wang & Bhupendra Sharma & Yuantao Xu & Kazuyuki Shimizu & Hiro Fujihara & Kyosuke Hirayama & Akihisa Takeuchi & Masayuki Uesugi & Guangxu Cheng & Hiroyuki Toda, 2022. "Switching nanoprecipitates to resist hydrogen embrittlement in high-strength aluminum alloys," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34628-4
    DOI: 10.1038/s41467-022-34628-4
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    References listed on IDEAS

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    1. John P. Hanson & Akbar Bagri & Jonathan Lind & Peter Kenesei & Robert M. Suter & Silvija Gradečak & Michael J. Demkowicz, 2018. "Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
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