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

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Peculiarity of hydrogen absorption in duplex steels: Phase-selective lattice swelling and stress evolution. / Pogrielz, Thomas; Eichinger, Matthias; Weiser, Adam et al.
in: Scripta Materialia, Jahrgang 248.2024, Nr. 15 July, 116142, 27.04.2024.

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

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Pogrielz T, Eichinger M, Weiser A, Todt J, Hohenwarter A, Ascii A et al. Peculiarity of hydrogen absorption in duplex steels: Phase-selective lattice swelling and stress evolution. Scripta Materialia. 2024 Apr 27;248.2024(15 July):116142. Epub 2024 Apr 27. doi: 10.1016/j.scriptamat.2024.116142

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@article{6104e36fe47a4345a1a6848f0d4a6c09,
title = "Peculiarity of hydrogen absorption in duplex steels: Phase-selective lattice swelling and stress evolution",
abstract = "Electrochemical hydrogen absorption in duplex steels is not fully understood. In this work, an in-situ synchrotron cross-sectional X-ray micro-diffraction 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/cm² for 5 h leads to expanding the austenitic lattice to a depth of approximately 250 µm, 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 in-plane compressive stresses, which amount to approximately -150 and -450 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.",
keywords = "Duplex steel, Electrochemistry, Hydrogen embrittlement, Residual stress, Synchrotron x-ray diffraction",
author = "Thomas Pogrielz and Matthias Eichinger and Adam Weiser and Juraj Todt and Anton Hohenwarter and Atacan Ascii and Baran Sarac and Dominik Brandl and Gerald Ressel and Milan Jary and Antonin Dlouh{\'y} and Mori, {Gregor Karl} and Jozef Keckes",
note = "Publisher Copyright: {\textcopyright} 2024 The Author(s)",
year = "2024",
month = apr,
day = "27",
doi = "10.1016/j.scriptamat.2024.116142",
language = "English",
volume = "248.2024",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier",
number = "15 July",

}

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TY - JOUR

T1 - Peculiarity of hydrogen absorption in duplex steels

T2 - Phase-selective lattice swelling and stress evolution

AU - Pogrielz, Thomas

AU - Eichinger, Matthias

AU - Weiser, Adam

AU - Todt, Juraj

AU - Hohenwarter, Anton

AU - Ascii, Atacan

AU - Sarac, Baran

AU - Brandl, Dominik

AU - Ressel, Gerald

AU - Jary, Milan

AU - Dlouhý, Antonin

AU - Mori, Gregor Karl

AU - Keckes, Jozef

N1 - Publisher Copyright: © 2024 The Author(s)

PY - 2024/4/27

Y1 - 2024/4/27

N2 - Electrochemical hydrogen absorption in duplex steels is not fully understood. In this work, an in-situ synchrotron cross-sectional X-ray micro-diffraction 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/cm² for 5 h leads to expanding the austenitic lattice to a depth of approximately 250 µm, 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 in-plane compressive stresses, which amount to approximately -150 and -450 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.

AB - Electrochemical hydrogen absorption in duplex steels is not fully understood. In this work, an in-situ synchrotron cross-sectional X-ray micro-diffraction 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/cm² for 5 h leads to expanding the austenitic lattice to a depth of approximately 250 µm, 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 in-plane compressive stresses, which amount to approximately -150 and -450 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.

KW - Duplex steel

KW - Electrochemistry

KW - Hydrogen embrittlement

KW - Residual stress

KW - Synchrotron x-ray diffraction

UR - https://doi.org/10.1016/j.scriptamat.2024.116142

UR - http://www.scopus.com/inward/record.url?scp=85191348338&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2024.116142

DO - 10.1016/j.scriptamat.2024.116142

M3 - Article

VL - 248.2024

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

IS - 15 July

M1 - 116142

ER -