Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5666
Título
Generalised boundary conditions for hydrogen transport at crack tips
Publicado en
Corrosion Science. 2020, V. 173, 108698
Editorial
Elsevier
Fecha de publicación
2020-08
ISSN
0010-938X
DOI
10.1016/j.corsci.2020.108698
Zusammenfassung
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.
Palabras clave
Hydrogen
Diffusion
Finite element analysis
Environmentally assisted cracking
Trapping
Materia
Resistencia de materiales
Strength of materials
Versión del editor
Aparece en las colecciones
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