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Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725

Author

Listed:
  • John P. Hanson

    (Massachusetts Institute of Technology)

  • Akbar Bagri

    (Johns Hopkins University
    Massachusetts Institute of Technology)

  • Jonathan Lind

    (Carnegie Mellon University
    Lawrence Livermore National Laboratory)

  • Peter Kenesei

    (Argonne National Laboratory)

  • Robert M. Suter

    (Carnegie Mellon University)

  • Silvija Gradečak

    (Massachusetts Institute of Technology)

  • Michael J. Demkowicz

    (Texas A&M University)

Abstract

Hydrogen embrittlement (HE) causes sudden, costly failures of metal components across a wide range of industries. Yet, despite over a century of research, the physical mechanisms of HE are too poorly understood to predict HE-induced failures with confidence. We use non-destructive, synchrotron-based techniques to investigate the relationship between the crystallographic character of grain boundaries and their susceptibility to hydrogen-assisted fracture in a nickel superalloy. Our data lead us to identify a class of grain boundaries with striking resistance to hydrogen-assisted crack propagation: boundaries with low-index planes (BLIPs). BLIPs are boundaries where at least one of the neighboring grains has a low Miller index facet—{001}, {011}, or {111}—along the grain boundary plane. These boundaries deflect propagating cracks, toughening the material and improving its HE resistance. Our finding paves the way to improved predictions of HE based on the density and distribution of BLIPs in metal microstructures.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05549-y
    DOI: 10.1038/s41467-018-05549-y
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    Cited by:

    1. Siwon Yu & Seunggyu Park & Kang Taek Lee & Jun Yeon Hwang & Soon Hyung Hong & Thomas James Marrow, 2024. "On the crack resistance and damage tolerance of 3D-printed nature-inspired hierarchical composite architecture," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    2. 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.

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