2026-05-29T20:44:52Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/83512024-04-12T11:43:11Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505
Lu, Xu
Díaz Portugal, Andrés
Ma, Jun
Wang, Dong
He, Jianying
Zhang, Zhiliang
Johnsen, Roy
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.
eng
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
Atribución 4.0 Internacional
Nickel alloy 625
Hydrogen
Diffusion
Plastic deformation
Permeation
The effect of plastic deformation on hydrogen diffusion in nickel Alloy 625
info:eu-repo/semantics/article