Finite-Element Simulation of Mass Transfer in Structurally Inhomogeneous Materials

The problem of nonisothermal hydrogen diffusion with variable coefficients of diffusion and solubility of hydrogen for structurally heterogeneous materials is solved by the finite-element method. The proposed algorithm is checked by finding the solution of the problem of hydrogen diffusion in a bime...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 2003-09, Vol.39 (5), p.712-720
Main Author: Gembara, O V
Format: Article
Language:English
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Summary:The problem of nonisothermal hydrogen diffusion with variable coefficients of diffusion and solubility of hydrogen for structurally heterogeneous materials is solved by the finite-element method. The proposed algorithm is checked by finding the solution of the problem of hydrogen diffusion in a bimetallic structural element. It is shown that nonstationary thermal processes (variations of temperature) in materials may lead to the formation of zones of temporal overequilibrium supersaturation with hydrogen and, hence, to hidden hydrogen degradation of the materials. [Material: 2.25Cr-1Mo covered with a protective coating of 04Kh20N12.]
ISSN:1068-820X
1573-885X
DOI:10.1023/B:MASC.0000023511.85134.04