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The causation of hydrogen embrittlement of duplex stainless steel : Phase instability of the austenite phase and ductile-to-brittle transition of the ferrite phase – Synergy between experiments and modelling

Örnek, Cem ; Mansoor, Mubashir ; Larsson, Alfred LU ; Zhang, Fan ; Harlow, Gary S. LU ; Kroll, Robin ; Carlà, Francesco ; Hussain, Hadeel ; Derin, Bora and Kivisäkk, Ulf , et al. (2023) In Corrosion Science 217.
Abstract

Various mechanisms have been proposed for hydrogen embrittlement of duplex stainless steel, but the causation of hydrogen-induced material degradation has remained unclear. This work shows that phase instability (decomposition) of the austenite phase and ductile-to-brittle transition of the ferrite phase precedes hydrogen embrittlement. In-situ diffraction measurements revealed that Ni-rich sites of the austenite phase decompose into metastable hydrides. Hydride formation is possible by increasing the hydrogen chemical potential during electrochemical charging and low defect formation energy of hydrogen interstitials. Our findings demonstrate that hydrogen embrittlement can only be understood if measured in situ and in real-time during... (More)

Various mechanisms have been proposed for hydrogen embrittlement of duplex stainless steel, but the causation of hydrogen-induced material degradation has remained unclear. This work shows that phase instability (decomposition) of the austenite phase and ductile-to-brittle transition of the ferrite phase precedes hydrogen embrittlement. In-situ diffraction measurements revealed that Ni-rich sites of the austenite phase decompose into metastable hydrides. Hydride formation is possible by increasing the hydrogen chemical potential during electrochemical charging and low defect formation energy of hydrogen interstitials. Our findings demonstrate that hydrogen embrittlement can only be understood if measured in situ and in real-time during the embrittlement process.

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organization
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type
Contribution to journal
publication status
published
subject
keywords
Density-functional theory, FactSage, High-energy X-ray diffraction, Hydride, Hydrogen embrittlement, Super duplex stainless steel
in
Corrosion Science
volume
217
article number
111140
publisher
Elsevier
external identifiers
  • scopus:85151237093
ISSN
0010-938X
DOI
10.1016/j.corsci.2023.111140
language
English
LU publication?
yes
id
4d6657bd-b4f6-4e00-98e2-54782ea2e1e1
date added to LUP
2023-05-15 15:13:24
date last changed
2023-11-08 05:53:10
@article{4d6657bd-b4f6-4e00-98e2-54782ea2e1e1,
  abstract     = {{<p>Various mechanisms have been proposed for hydrogen embrittlement of duplex stainless steel, but the causation of hydrogen-induced material degradation has remained unclear. This work shows that phase instability (decomposition) of the austenite phase and ductile-to-brittle transition of the ferrite phase precedes hydrogen embrittlement. In-situ diffraction measurements revealed that Ni-rich sites of the austenite phase decompose into metastable hydrides. Hydride formation is possible by increasing the hydrogen chemical potential during electrochemical charging and low defect formation energy of hydrogen interstitials. Our findings demonstrate that hydrogen embrittlement can only be understood if measured in situ and in real-time during the embrittlement process.</p>}},
  author       = {{Örnek, Cem and Mansoor, Mubashir and Larsson, Alfred and Zhang, Fan and Harlow, Gary S. and Kroll, Robin and Carlà, Francesco and Hussain, Hadeel and Derin, Bora and Kivisäkk, Ulf and Engelberg, Dirk L. and Lundgren, Edvin and Pan, Jinshan}},
  issn         = {{0010-938X}},
  keywords     = {{Density-functional theory; FactSage; High-energy X-ray diffraction; Hydride; Hydrogen embrittlement; Super duplex stainless steel}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Corrosion Science}},
  title        = {{The causation of hydrogen embrittlement of duplex stainless steel : Phase instability of the austenite phase and ductile-to-brittle transition of the ferrite phase – Synergy between experiments and modelling}},
  url          = {{http://dx.doi.org/10.1016/j.corsci.2023.111140}},
  doi          = {{10.1016/j.corsci.2023.111140}},
  volume       = {{217}},
  year         = {{2023}},
}