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Aurélie Laureys https://orcid.org/0000-0001-5552-3376 Margot Pinson https://orcid.org/0000-0001-8198-4950 Lisa Claeys https://orcid.org/0000-0002-3034-4889 Tim Deseranno https://orcid.org/0000-0002-3374-5047 Tom Depover https://orcid.org/0000-0002-8856-1122 Kim Verbeken https://orcid.org/0000-0002-5190-016X

Abstract

The goal of this work is to propose a general mechanism for hydrogen induced crack initiation in steels based on a microstructural study of multiple steel grades. Four types of steels with strongly varying microstructures are studied for this purpose, i.e. ultra low carbon (ULC) steel, TRIP (transformation induced plasticity) steel, Fe-C-Ti generic alloy, and pressure vessel steel. A strong dependency of the initiation of hydrogen induced cracks on the microstructural features in the materials is observed. By use of SEM-EBSD characterization, initiation is found to always occur at the hard secondary phase particles in the materials.

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    Section
    SI: 1st Benelux Network Meeting and Workshop on Damage and Fracture Mechanics

    How to Cite

    Laureys, A., Pinson, M., Claeys, L., Deseranno, T., Depover, T. and Verbeken, K. (2020) “Initiation of hydrogen induced cracks at secondary phase particles”, Frattura ed Integrità Strutturale, 14(52), pp. 113-127. doi: 10.3221/IGF-ESIS.52.10.