2026-05-11T11:43:38Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/83512024-04-12T11:43:11Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505
Lu, Xu
faca4d95-07ef-4b0d-93a7-6b86b081f277
600
Díaz Portugal, Andrés
147
600
0000-0002-2344-1955
Ma, Jun
fa1ba58e-7774-4b9b-9ea8-0e208a824735
600
Wang, Dong
2c09a662-f546-46d5-84ef-f9d8ea12150a
600
He, Jianying
85db3024-082a-447c-ac50-0a5c47ed0bdb
600
Zhang, Zhiliang
340389cd-b5dd-40a1-b044-15f7405aa0e3
600
Johnsen, Roy
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600
2024-01-16T09:04:45Z
2024-01-16T09:04:45Z
2023-03
1359-6462
http://hdl.handle.net/10259/8351
10.1016/j.scriptamat.2022.115210
Recently, several hydrogen-assisted failures have been reported on different nickel alloys used in the subsea oil
and gas industries. It is thus essential to correlate hydrogen uptake and diffusion behavior with stress conditions
for an in-depth understanding of the failures. This study reports the first-hand finding on hydrogen diffusion
behavior in a nickel Alloy 625 under different pre-strain levels by combining the electrochemical permeation test
and diffusion model, with a particular focus on the effect of grain boundary carbide. As the multiplication of
dislocations was claimed to trap hydrogen atoms and reduce the diffusivity by increasing the strain levels from
0.05 to 0.2, an acceleration in hydrogen diffusivity was however observed when the strain was higher than 0.1.
This phenomenon was deduced to be caused by the diffusion highways by the hydrogen-enhanced strain-induced
vacancy formation at the grain boundaries and reduced hydrogen trapping by the fractured carbides.
The authors acknowledge the financial support from the Research Council of Norway through the project M-HEAT (294689) and the industry companies in the project. The Research Council of Norway is acknowledged for the support to the Norwegian Micro- and Nano-Fabrication Facility, NorFab, project number 295864. A. Díaz gratefully acknowledges the financial support from the Junta of Castile and Leon through grant BU-002-P20, co-financed by FEDER funds, and wishes to thank the Nanomechanical Lab of NTNU for providing hospitality during his research stay.
application/pdf
eng
Elsevier
Scripta Materialia. 2023, V. 226, 115210
https://doi.org/10.1016/j.scriptamat.2022.115210
Atribución 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
Nickel alloy 625
Hydrogen
Diffusion
Plastic deformation
Permeation
Ingeniería civil
Resistencia de materiales
Civil engineering
Strength of materials
The effect of plastic deformation on hydrogen diffusion in nickel Alloy 625
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Scripta Materialia
226
THUMBNAIL
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2024-04-12 13:43:11.574
Repositorio Institucional de la Universidad de Burgos
bubrep@ubu.es
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