2024-03-29T06:36:08Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/56662021-11-02T12:04:40Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505
2021-03-24T12:32:59Z
urn:hdl:10259/5666
Generalised boundary conditions for hydrogen transport at crack tips
Martínez Pañeda, Emilio
Díaz Portugal, Andrés
Wright, Louise
Turnbull, Alan
Hydrogen
Diffusion
Finite element analysis
Environmentally assisted cracking
Trapping
We present a generalised framework for resolving the electrochemistry-diffusion interface and modelling hydrogen transport near a crack tip. The adsorption and absorption kinetics are captured by means of Neumann-type generalised boundary conditions. The diffusion model includes the role of trapping, with a constant or evolving trap density, and the influence of the hydrostatic stress. Both conventional plasticity and strain gradient plasticity are used to model the mechanical behaviour of the solid. Notable differences are found in the estimated crack tip hydrogen concentrations when comparing with the common procedure of prescribing a constant hydrogen concentration at the crack surfaces.
2021-03-24T12:32:59Z
2021-03-24T12:32:59Z
2020-08
2022-08-15
info:eu-repo/semantics/article
0010-938X
http://hdl.handle.net/10259/5666
10.1016/j.corsci.2020.108698
eng
Corrosion Science. 2020, V. 173, 108698
https://doi.org/10.1016/j.corsci.2020.108698
info:eu-repo/grantAgreement/MICINN/RTI2018-096070-B-C33
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier