2026-06-19T13:20:58Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/56662021-11-02T12:04:40Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505

Martínez Pañeda, Emilio Díaz Portugal, Andrés Wright, Louise Turnbull, Alan 2021-03-24T12:32:59Z 2021-03-24T12:32:59Z 2020-08 2022-08-15 0010-938X http://hdl.handle.net/10259/5666 10.1016/j.corsci.2020.108698 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. E. Martínez-Pañeda acknowledges financial support from EPSRC funding under grant no.EP/R010161/1, from the UKCRIC Coordination Node EPSRC grant number EP/R017727/1, which funds UKCRIC's ongoing coordination, and from Wolfson College Cambridge (Junior Research Fellowship). A. Díaz gratefully acknowledges financial support from the Ministry of Science, Innovation and Universities of Spain through grant RTI2018-096070-B-C33. application/pdf eng Elsevier Corrosion Science. 2020, V. 173, 108698 https://doi.org/10.1016/j.corsci.2020.108698 info:eu-repo/grantAgreement/MICINN/RTI2018-096070-B-C33 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Hydrogen Diffusion Finite element analysis Environmentally assisted cracking Trapping Resistencia de materiales Strength of materials Generalised boundary conditions for hydrogen transport at crack tips info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Corrosion Science 173 108698