Initiation of hydrogen induced cracks at secondary phase particles

Aurélie Laureys; Margot Pinson; Lisa Claeys; Tim Deseranno; Tom Depover; Kim Verbeken

doi:10.3221/IGF-ESIS.52.10

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Published Mar 14, 2020

DOI https://doi.org/10.3221/IGF-ESIS.52.10

Aurélie Laureys

Ghent University, Department of Materials, Textiles and Chemical Engineering, Technologiepark 46, 9052 Zwijnaarde, Belgium

https://orcid.org/0000-0001-5552-3376 Margot Pinson

Ghent University, Department of Materials, Textiles and Chemical Engineering, Technologiepark 46, 9052 Zwijnaarde, Belgium

https://orcid.org/0000-0001-8198-4950 Lisa Claeys

Ghent University, Department of Materials, Textiles and Chemical Engineering, Technologiepark 46, 9052 Zwijnaarde, Belgium

https://orcid.org/0000-0002-3034-4889 Tim Deseranno

Ghent University, Department of Materials, Textiles and Chemical Engineering, Technologiepark 46, 9052 Zwijnaarde, Belgium

https://orcid.org/0000-0002-3374-5047 Tom Depover

Ghent University, Department of Materials, Textiles and Chemical Engineering, Technologiepark 46, 9052 Zwijnaarde, Belgium

https://orcid.org/0000-0002-8856-1122 Kim Verbeken

Ghent University, Department of Materials, Textiles and Chemical Engineering, Technologiepark 46, 9052 Zwijnaarde, Belgium

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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Issue

Vol. 14 No. 52 (2020): April 2020

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., & Verbeken, K. (2020). Initiation of hydrogen induced cracks at secondary phase particles. Frattura Ed Integrità Strutturale, 14(52), 113–127. https://doi.org/10.3221/IGF-ESIS.52.10

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