Distribution of Hydrogen Concentration in a Compact Specimen Under the Conditions of Electrolytic Hydrogenation

摘要

We propose a computational model for the evaluation of the distribution of hydrogen concentration in a compact specimen under the conditions of its electrolytic hydrogenation. The compact specimen is modeled by a parallelepiped whose surface opposite to the crack tip is immersed in the electrolyte down to a certain depth. The specimen is hydrogenated through this surface. The applied mathematical model is based on the Fick equation with initial and boundary conditions. A constant hydrogen concentration is assigned on the immersed surface of the parallelepiped; on the other surface, this concentration is set equal to zero. The mathematical model is realized by the finite-element method and the distribution of hydrogen concentration over the parallelepiped is determined in the form of a function of geometry and time.