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Article Dans Une Revue Corrosion Science Année : 2024

Local crack arrestability and deformation microstructure evolution of hydrogen-related fracture in martensitic steel

Résumé

Intergranular cracks in the uncharged specimen were arrested at low-angle prior austenite grain boundary (PAGB) segments of several micrometers. In contrast, even small, low-angle PAGB segments with sub-micrometer sizes impeded the propagation of hydrogen-related intergranular crack. At the hydrogen-related quasi-cleavage crack tip, the crystallographic orientation changed abruptly, and deformation microstructures developed, including the formation of low-energy dislocation structures. A certain degree of crack growth resistance (intrinsic crack growth resistance) in the hydrogen-related fractures could be attributed to the intense localized plastic works involved in the arrest of intergranular cracks and the propagation of quasi-cleavage cracks.

Domaines

Matériaux
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Origine : Publication financée par une institution
Licence : CC BY - Paternité

Dates et versions

hal-04563097 , version 1 (29-04-2024)

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Paternité

Identifiants

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Akinobu Shibata, Ivan Gutierrez-Urrutia, Akiko Nakamura, Taku Moronaga, Kazuho Okada, et al.. Local crack arrestability and deformation microstructure evolution of hydrogen-related fracture in martensitic steel. Corrosion Science, 2024, pp.112092. ⟨10.1016/j.corsci.2024.112092⟩. ⟨hal-04563097⟩
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