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Initiation of hydrogen induced cracks at secondary phase particles
Tijdschriftbijdrage - Tijdschriftartikel
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.
Tijdschrift: FRATTURA ED INTEGRITA STRUTTURALE-FRACTURE AND STRUCTURAL INTEGRITY
ISSN: 1971-8993
Volume: 52
Pagina's: 113 - 127
Jaar van publicatie:2020
Toegankelijkheid:Open