The role of hydrogen diffusion, trapping and desorption in dual phase steels

Andreas Drexler*, Besim Helic, Zahra Silvayeh, Klemens Mraczek, Christof Sommitsch, Josef Domitner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)4789–4805
Number of pages17
JournalJournal of Materials Science
Issue number7
Publication statusPublished - Feb 2022

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

Fields of Expertise

  • Advanced Materials Science


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