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oai: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