Anzeige
Erschienen in:
2020 | OriginalPaper | Buchkapitel
Calculation of the Activation Energies of Hydrogen in Titanium Manufactured with 3D Printing Technology by Means of a Multichannel Diffusion Model
verfasst von : P. A. Zumberov, Yu. A. Yakovlev, V. A. Polyanskiy
Erschienen in: Advanced Problems in Mechanics
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
The most popular method for calculating activation energies of hydrogen is the method of thermo-desorption spectra (TDS). The disadvantage of this method is that it does not consider diffusion inside the metal. Essentially, only surface sorption and desorption can be adequately studied using this method. All this leads to large variations of experimentally evaluated activation energies for the same materials.
The present paper proposes a method for calculation of the activation energies of hydrogen based on experimental data. Measurements were carried out using the industrial mass-spectrometric hydrogen analyzer AV-1, which uses the hot vacuum extraction method. The authors of the paper realize a gradual heating in a vacuum to measure the activation energies of hydrogen in titanium. The mathematical model is based on the model of multichannel diffusion of hydrogen. Calculation of hydrogen flows and their time integrals, which characterize the integral experimental results on every temperature step, were performed using a Fortran program. The parameters of the sample and the experiment conditions were entered into the program. As a result, the activation energies of hydrogen diffusion were calculated. Using these activation energies, a graph of discrete thermo-diffusion spectrum was plotted, which was then compared to the graph obtained during the experiment.