The hydrogen embrittlement sensitivity of duplex stainless steel with different phase fractions evaluated by in-situ mechanical testing

Margo Cauwels; Lisa Claeys; Tom Depover; Kim Verbeken

doi:10.3221/IGF-ESIS.51.33

The hydrogen embrittlement sensitivity of duplex stainless steel with different phase fractions evaluated by in-situ mechanical testing

Authors

Margo Cauwels Ghent University https://orcid.org/0000-0002-8127-5844
Lisa Claeys Ghent University https://orcid.org/0000-0002-3034-4889
Tom Depover Ghent University https://orcid.org/0000-0002-8856-1122
Kim Verbeken Ghent University https://orcid.org/0000-0002-5190-016X

DOI:

https://doi.org/10.3221/IGF-ESIS.51.33

Keywords:

Hydrogen embrittlement, Duplex stainless steel, In-situ mechanical testing

Abstract

The influence of the austenite (γ) phase fraction on the hydrogen embrittlement of duplex stainless steel is investigated. Heat treatments are performed to create two duplex stainless steel specimens, containing 50% and 44% of austenite, respectively. Mechanical testing with and without hydrogen charging reveals that significant embrittlement occurs regardless of the austenite fraction. A higher austenite fraction results in a reduced ductility loss under the presence of hydrogen. Samples with a higher ferrite fraction are embrittled more due to their higher hydrogen diffusivity. In-situ tensile tests, interrupted at the ultimate tensile strength, show hydrogen-assisted cracks on the specimen surface both in austenite and ferrite and across the α/γ interface.

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Published

07-12-2019

Issue

Vol. 14 No. 51 (2020): January 2020

Section

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

License

Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.

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How to Cite

The hydrogen embrittlement sensitivity of duplex stainless steel with different phase fractions evaluated by in-situ mechanical testing. (2019). Frattura Ed Integrità Strutturale, 14(51), 449-458. https://doi.org/10.3221/IGF-ESIS.51.33