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

John P. Hanson; Akbar Bagri; Jonathan Lind; Peter Kenesei; Robert M. Suter; Silvija Gradečak; Michael J. Demkowicz

doi:10.1038/s41467-018-05549-y

Nature Communications (Aug 2018)

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

John P. Hanson,
Akbar Bagri,
Jonathan Lind,
Peter Kenesei,
Robert M. Suter,
Silvija Gradečak,
Michael J. Demkowicz

Affiliations

John P. Hanson: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology
Akbar Bagri: Department of Civil Engineering, Johns Hopkins University
Jonathan Lind: Department of Physics, Carnegie Mellon University
Peter Kenesei: Advanced Photon Source, Argonne National Laboratory
Robert M. Suter: Department of Physics, Carnegie Mellon University
Silvija Gradečak: Department of Materials Science and Engineering, Massachusetts Institute of Technology
Michael J. Demkowicz: Materials Science and Engineering, Texas A&M University

DOI: https://doi.org/10.1038/s41467-018-05549-y
Journal volume & issue: Vol. 9, no. 1
pp. 1 – 11

Abstract

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Exactly how hydrogen renders metals brittle is still unclear, and it remains a challenge to predict component failure due to hydrogen embrittlement. Here, the authors identify a class of grain boundaries in a nickel superalloy that deflects propagating cracks and improves alloy resistance to hydrogen.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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