Impact of microstructural variations on hydrogen permeation into duplex steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00637782" target="_blank" >RIV/68081723:_____/25:00637782 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:001534292900002" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:001534292900002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtla.2025.102475" target="_blank" >10.1016/j.mtla.2025.102475</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of microstructural variations on hydrogen permeation into duplex steel

Popis výsledku v původním jazyce

Hydrogen embrittlement remains a significant challenge in steel applications with its underlying mechanisms still not fully understood. This study examines the influence of microstructural variations in duplex steel on hydrogen uptake during electrolytic charging over a duration of four hours. To address this, three distinct microstructural states are analyzed: initial (coarse-grained), high-pressure torsion (HPT) as-processed, and heattreated HPT states, with hydrogen penetration affecting depths of approximately 100 mu m. In-situ synchrotron cross-sectional X-ray micro-diffraction reveals that, in the nanocrystalline HPT as-processed sample, austenite and ferrite exhibit lattice parameter expansions of 0.015 and 0.003 & Aring, respectively. In contrast, the initial (coarse-grained) sample shows a 0.005 & Aring, increase in austenite, while no detectable change is observed in ferrite. The pronounced lattice swelling in both phases of the nanocrystalline microstructure is accompanied by an increase in compressive in-plane stresses of 200 MPa in austenite and 850 MPa in ferrite. Furthermore, thermal desorption spectroscopy indicates a hydrogen uptake of 16 ppm in the HPT as-processed state, exceeding the coarse-grained condition by 4 ppm. Subsequent heat treatment reduces hydrogen uptake to 4 ppm, yielding a fivefold decrease in the variation of the austenite lattice parameter while preserving the ferrite response observed in the as-processed HPT sample. The distinct responses of austenite and ferrite to hydrogen charging are attributed to their respective microstructural characteristics, as revealed by electron microscopy analyses. These findings provide new insights into the microstructural control of hydrogen transport in duplex steels, with important implications for the design and development of hydrogen-resistant materials.

Název v anglickém jazyce

Impact of microstructural variations on hydrogen permeation into duplex steel

Popis výsledku anglicky

Hydrogen embrittlement remains a significant challenge in steel applications with its underlying mechanisms still not fully understood. This study examines the influence of microstructural variations in duplex steel on hydrogen uptake during electrolytic charging over a duration of four hours. To address this, three distinct microstructural states are analyzed: initial (coarse-grained), high-pressure torsion (HPT) as-processed, and heattreated HPT states, with hydrogen penetration affecting depths of approximately 100 mu m. In-situ synchrotron cross-sectional X-ray micro-diffraction reveals that, in the nanocrystalline HPT as-processed sample, austenite and ferrite exhibit lattice parameter expansions of 0.015 and 0.003 & Aring, respectively. In contrast, the initial (coarse-grained) sample shows a 0.005 & Aring, increase in austenite, while no detectable change is observed in ferrite. The pronounced lattice swelling in both phases of the nanocrystalline microstructure is accompanied by an increase in compressive in-plane stresses of 200 MPa in austenite and 850 MPa in ferrite. Furthermore, thermal desorption spectroscopy indicates a hydrogen uptake of 16 ppm in the HPT as-processed state, exceeding the coarse-grained condition by 4 ppm. Subsequent heat treatment reduces hydrogen uptake to 4 ppm, yielding a fivefold decrease in the variation of the austenite lattice parameter while preserving the ferrite response observed in the as-processed HPT sample. The distinct responses of austenite and ferrite to hydrogen charging are attributed to their respective microstructural characteristics, as revealed by electron microscopy analyses. These findings provide new insights into the microstructural control of hydrogen transport in duplex steels, with important implications for the design and development of hydrogen-resistant materials.

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

2025

Kód důvěrnosti údajů

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

Název periodika

Materialia

ISSN

2589-1529

e-ISSN

2589-1529

Svazek periodika

42

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

102475

Kód UT WoS článku

001534292900002

EID výsledku v databázi Scopus

2-s2.0-105010689789