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Drexler, Andreas; Helic, Besim; Silvayeh, Zahra; Mraczek, Klemens; Sommitsch, Christof; Domitner, Josef
Journal of materials science, 02/2022, Letnik: 57, Številka: 7Journal Article
Hydrogen embrittlement (HE) of advanced high-strength steels is a crucial problem in the automotive industry, which may cause time-delayed failure of car body components. Practical approaches for evaluating the HE risk are often partially and contradictive in nature, because of hydrogen desorption during testing and inhomogenous hydrogen distributions in, e.g., notched samples. Therefore, the present work aims to provide fully parametrized and validated bulk diffusion models for three dual phase steels to simulate long-range chemical diffusion, trapping and hydrogen desorption from the surface. With one constant set of parameters, the models are able to predict the temperature dependency of measured Choo-Lee plots as well as the concentration dependency of measured effective diffusion coefficients. Finally, the parametrized and validated bulk diffusion models are applied for studying the role of the current density on the permeation time and the role of coatings as effective diffusion barriers. Graphical abstract
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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