Hydrogen embrittlement through the formation of low-energy dislocation nanostructures in nanoprecipitation-strengthened steels
Hydrogen embrittlement through the formation of low-energy dislocation nanostructures in nanoprecipitation-strengthened steels
Hydrogen embrittlement is shown to proceed through a previously unidentified mechanism. Upon ingress to the microstructure, hydrogen promotes the formation of low-energy dislocation nanostructures. These are characterized by cell patterns whose misorientation increases with strain, which concomitantly attracts further hydrogen up to a critical amount inducing failure. The appearance of the failure zone resembles the "fish eye"associated to inclusions as stress concentrators, a commonly accepted cause for failure. It is shown that the actual crack initiation is the dislocation nanostructure and its associated strain partitioning.
Gong, P.
ce58ecd3-38ef-4054-a8e0-68da3f994c55
Nutter, J.
bfeb97ea-8696-4dcf-8a34-c980332d2d65
Rivera-Diaz-Del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Rainforth, W.M.
7226983c-4ca1-4f0a-8191-02e3424dc98f
11 November 2020
Gong, P.
ce58ecd3-38ef-4054-a8e0-68da3f994c55
Nutter, J.
bfeb97ea-8696-4dcf-8a34-c980332d2d65
Rivera-Diaz-Del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Rainforth, W.M.
7226983c-4ca1-4f0a-8191-02e3424dc98f
Gong, P., Nutter, J., Rivera-Diaz-Del-Castillo, P.E.J. and Rainforth, W.M.
(2020)
Hydrogen embrittlement through the formation of low-energy dislocation nanostructures in nanoprecipitation-strengthened steels.
Science Advances, 6 (46), [eabb6152].
(doi:10.1126/sciadv.abb6152).
Abstract
Hydrogen embrittlement is shown to proceed through a previously unidentified mechanism. Upon ingress to the microstructure, hydrogen promotes the formation of low-energy dislocation nanostructures. These are characterized by cell patterns whose misorientation increases with strain, which concomitantly attracts further hydrogen up to a critical amount inducing failure. The appearance of the failure zone resembles the "fish eye"associated to inclusions as stress concentrators, a commonly accepted cause for failure. It is shown that the actual crack initiation is the dislocation nanostructure and its associated strain partitioning.
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sciadv.abb6152
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Accepted/In Press date: 29 September 2020
Published date: 11 November 2020
Identifiers
Local EPrints ID: 492258
URI: http://eprints.soton.ac.uk/id/eprint/492258
ISSN: 2375-2548
PURE UUID: 0c649b6c-e42c-4434-87f3-a81b619ab151
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Date deposited: 23 Jul 2024 16:34
Last modified: 24 Jul 2024 02:07
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Author:
P. Gong
Author:
J. Nutter
Author:
P.E.J. Rivera-Diaz-Del-Castillo
Author:
W.M. Rainforth
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