The influence of grain size on hydrogen embrittlement of a multicomponent (FeCrNiMnCo)99N1 alloy
- Authors: Gurtova D.Y.1, Panchenko M.Y.2, Melnikov E.V.2, Astapov D.O.1, Astafurova E.G.2
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Affiliations:
- Tomsk State University
- Institute of Strength Physics and Materials Science of Siberian Branch of RAS
- Issue: No 3 (2024)
- Pages: 41-51
- Section: Articles
- URL: https://vektornaukitech.ru/jour/article/view/967
- DOI: https://doi.org/10.18323/2782-4039-2024-3-69-4
- ID: 967
Cite item
Abstract
The problem of hydrogen embrittlement remains relevant in many areas, so the FeCrNiMnCo alloy (Cantor alloy) generates increased interest among researchers as one of the materials least exposed to the negative effect of hydrogen. Nevertheless, the issue of the influence of microstructure parameters on hydrogen embrittlement of the Cantor alloy and multicomponent alloys of the FeCrNiMnCo system in general remains understudied. This work studies the influence of grain size on the susceptibility of a nitrogen-doped high-entropy Cantor alloy to hydrogen embrittlement. For this purpose, states with different grain sizes (43±21, 120±57, and 221±97 μm) were formed in the (FeCrNiMnCo)99N1 alloy, using thermomechanical treatments. It is experimentally found that grain refinement leads to an increase in the strength properties of the alloy under study and promotes an increase in the resistance to the hydrogen embrittlement: in samples with the smallest grain size, the hydrogen-induced decrease in ductility is less than in samples with the largest one. A decrease in grain size causes as well a decrease in the length of the brittle zone detected on the fracture surfaces of samples after tension. This is caused by a decrease in hydrogen diffusion during the hydrogen-charging process and a decrease in the transport of hydrogen atoms with mobile dislocations during plastic deformation due to a decrease in grain size.
About the authors
Darya Yu. Gurtova
Tomsk State University
Author for correspondence.
Email: dasha_gurtova@mail.ru
student
Russian Federation, 634050, Russia, Tomsk, Lenin Prospekt, 36Marina Yu. Panchenko
Institute of Strength Physics and Materials Science of Siberian Branch of RAS
Email: panchenko.marina4@gmail.com
ORCID iD: 0000-0003-0236-2227
junior researcher of Laboratory of Physics of Hierarchic Structures in Metals and Alloys
Russian Federation, 634055, Russia, Tomsk, Akademichesky Prospekt, 2/4Evgeny V. Melnikov
Institute of Strength Physics and Materials Science of Siberian Branch of RAS
Email: melnickow.jenya@yandex.ru
ORCID iD: 0000-0001-8238-6055
junior researcher of Laboratory of Physics of Hierarchic Structures in Metals and Alloys
Russian Federation, 634055, Russia, Tomsk, Akademichesky Prospekt, 2/4Denis O. Astapov
Tomsk State University
Email: denis.0612@mail.ru
ORCID iD: 0000-0002-1277-4180
student
Russian Federation, 634050, Russia, Tomsk, Lenin Prospekt, 36Elena G. Astafurova
Institute of Strength Physics and Materials Science of Siberian Branch of RAS
Email: elena.g.astafurova@gmail.com
ORCID iD: 0000-0002-1995-4205
Doctor of Sciences (Physics and Mathematics), Head of Laboratory of Physics of Hierarchic Structures in Metals and Alloys
Russian Federation, 634055, Russia, Tomsk, Akademichesky Prospekt, 2/4References
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