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Metastable precursor structures in hydrogen-infused super duplex stainless steel microstructure – An operando diffraction experiment

Örnek, Cem ; Larsson, Alfred LU ; Harlow, Gary S. LU ; Zhang, Fan LU ; Kroll, Robin ; Carlà, Franceso ; Hussain, Hadeel ; Kivisäkk, Ulf ; Engelberg, Dirk L. and Lundgren, Edvin LU , et al. (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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organization
publishing date
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}},
}