Metastable precursor structures in hydrogen-infused super duplex stainless steel microstructure – An operando diffraction experiment
(2020) In Corrosion Science 176.- Abstract
We report the evolution of metastable precursor structures during hydrogen infusion in the near-surface region of a super duplex stainless steel. Grazing-incidence x-ray diffraction was employed to monitor, operando, the lattice degradation of the austenite and ferrite phases. Electrochemical hydrogen charging resulted in the splitting of the diffraction peaks of the austenite phase, suggesting the evolution of a metastable precursor structure. This may be explained by the formation of quasi-hydrides, which convert back into the austenite parent structure during hydrogen effusion. The ferrite showed less lattice deformation than the austenite and no phase transformation.
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- author
- organization
- publishing date
- 2020-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Duplex stainless steels, Grazing-incidence x-ray diffraction (GIXRD), Hydride, Hydrogen embrittlement, Synchrotron radiation
- in
- Corrosion Science
- volume
- 176
- article number
- 109021
- publisher
- Elsevier
- external identifiers
-
- scopus:85091734526
- ISSN
- 0010-938X
- DOI
- 10.1016/j.corsci.2020.109021
- language
- English
- LU publication?
- yes
- id
- 9edaf2a5-6fa8-4cf9-9567-9c5cf774cfcc
- date added to LUP
- 2020-10-12 16:34:33
- date last changed
- 2023-11-20 12:19:18
@article{9edaf2a5-6fa8-4cf9-9567-9c5cf774cfcc, abstract = {{<p>We report the evolution of metastable precursor structures during hydrogen infusion in the near-surface region of a super duplex stainless steel. Grazing-incidence x-ray diffraction was employed to monitor, operando, the lattice degradation of the austenite and ferrite phases. Electrochemical hydrogen charging resulted in the splitting of the diffraction peaks of the austenite phase, suggesting the evolution of a metastable precursor structure. This may be explained by the formation of quasi-hydrides, which convert back into the austenite parent structure during hydrogen effusion. The ferrite showed less lattice deformation than the austenite and no phase transformation.</p>}}, author = {{Örnek, Cem and Larsson, Alfred and Harlow, Gary S. and Zhang, Fan and Kroll, Robin and Carlà, Franceso and Hussain, Hadeel and Kivisäkk, Ulf and Engelberg, Dirk L. and Lundgren, Edvin and Pan, Jinshan}}, issn = {{0010-938X}}, keywords = {{Duplex stainless steels; Grazing-incidence x-ray diffraction (GIXRD); Hydride; Hydrogen embrittlement; Synchrotron radiation}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Corrosion Science}}, title = {{Metastable precursor structures in hydrogen-infused super duplex stainless steel microstructure – An operando diffraction experiment}}, url = {{http://dx.doi.org/10.1016/j.corsci.2020.109021}}, doi = {{10.1016/j.corsci.2020.109021}}, volume = {{176}}, year = {{2020}}, }