Peculiarity of hydrogen absorption in duplex steels: Phase-selective lattice swelling and stress evolution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00586611" target="_blank" >RIV/68081723:_____/24:00586611 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1359646224001775?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1359646224001775?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.scriptamat.2024.116142" target="_blank" >10.1016/j.scriptamat.2024.116142</a>

Result language
angličtina
Original language name
Peculiarity of hydrogen absorption in duplex steels: Phase-selective lattice swelling and stress evolution
Original language description
Electrochemical hydrogen absorption in duplex steels is not fully understood. In this work, an insitu synchrotron cross-sectional X-ray microdiffraction analysis is performed on steel with comparable phase fractions of ferrite and austenite, coupled with electrolytic hydrogen charging. The results reveal that charging with a constant current density of 10 mA/cm 2 for 5 h leads to expanding the austenitic lattice to a depth of approximately 250 mu m, up to >= 0.15 %. In contrast, the lattice parameter of the ferrite phase remains unchanged during this process. As the austenite expansion progresses, it generates different amounts of equivalent inplane compressive stresses, which amount to approximately150 and450 MPa in the austenite and ferrite phases at the sample surface , respectively. Using a finite element model of grain interaction, this difference is qualitatively interpreted by mutual mechanical constraints between ferrite and austenite, as well as between the hydrogen-charged surface layer and the underlying material.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering

Project
<a href="/en/project/GA20-11321S" target="_blank" >GA20-11321S: Influence of microstructure and surface treatments on hydrogen intake in bio-compatible alloys</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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