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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA20-11321S" target="_blank" >GA20-11321S: Vliv mikrostruktury a povrchových úprav na absorpci vodíku v bio-kompatibilních slitinách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scripta Materialia

ISSN

1359-6462

e-ISSN

1872-8456

Svazek periodika

248

Číslo periodika v rámci svazku

Jul

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

116142

Kód UT WoS článku

001235233700001

EID výsledku v databázi Scopus

2-s2.0-85191348338