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

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. Lastly, our finding paves the way to improved predictions of HE based on the density and distribution of BLIPs in metal microstructures.

Authors:
ORCiD logo; ; ; ; ORCiD logo; ; ORCiD logo
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Massachusetts Institute of Technology (MIT); National Science Foundation (NSF)
OSTI Identifier:
1464978
Alternate Identifier(s):
OSTI ID: 1473682; OSTI ID: 1648409
Report Number(s):
LLNL-JRNL-751265
Journal ID: ISSN 2041-1723; 3386; PII: 5549
Grant/Contract Number:  
AC52-07NA27344; AC02-06CH11357; AC02-1206CH11357; DMR—0213282; AC05-06OR231001150862; TG-DMR130061
Resource Type:
Published Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Name: Nature Communications Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Hanson, John P., Bagri, Akbar, Lind, Jonathan, Kenesei, Peter, Suter, Robert M., Gradečak, Silvija, and Demkowicz, Michael J. Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725. United Kingdom: N. p., 2018. Web. doi:10.1038/s41467-018-05549-y.
Hanson, John P., Bagri, Akbar, Lind, Jonathan, Kenesei, Peter, Suter, Robert M., Gradečak, Silvija, & Demkowicz, Michael J. Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725. United Kingdom. https://doi.org/10.1038/s41467-018-05549-y
Hanson, John P., Bagri, Akbar, Lind, Jonathan, Kenesei, Peter, Suter, Robert M., Gradečak, Silvija, and Demkowicz, Michael J. Thu . "Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725". United Kingdom. https://doi.org/10.1038/s41467-018-05549-y.
@article{osti_1464978,
title = {Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725},
author = {Hanson, John P. and Bagri, Akbar and Lind, Jonathan and Kenesei, Peter and Suter, Robert M. and Gradečak, Silvija and Demkowicz, Michael J.},
abstractNote = {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. Lastly, our finding paves the way to improved predictions of HE based on the density and distribution of BLIPs in metal microstructures.},
doi = {10.1038/s41467-018-05549-y},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United Kingdom},
year = {Thu Aug 23 00:00:00 EDT 2018},
month = {Thu Aug 23 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1038/s41467-018-05549-y

Citation Metrics:
Cited by: 46 works
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