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Microstructural evolution during hot deformation of duplex stainless steel

Dehghan-Manshadi, A., Barnett, Matthew and Hodgson, Peter 2007, Microstructural evolution during hot deformation of duplex stainless steel, Materials science and technology, vol. 23, no. 12, pp. 1478-1484.

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Title Microstructural evolution during hot deformation of duplex stainless steel
Author(s) Dehghan-Manshadi, A.
Barnett, Matthew
Hodgson, Peter
Journal name Materials science and technology
Volume number 23
Issue number 12
Start page 1478
End page 1484
Publisher Maney Publishing
Place of publication London, England
Publication date 2007-12
ISSN 0267-0836
1743-2847
Keyword(s) duplex stainless steel
hot deformation
EBSD
dynamic recrystallisation
Summary The microstructure evolution during hot deformation of a 23Cr-5Ni-3Mo duplex stainless steel was investigated in torsion. The presence of a soft δ ferrite phase in the vicinity of austenite caused strain partitioning, with accommodation of more strain in the δ ferrite. Furthermore, owing to the limited number of austenite/austenite grain boundaries, the kinetics of dynamic recrystallisation (DRX) in austenite was very slow. The first DRX grains in the austenite phase formed at a strain beyond the peak and proceeded to <15% of the microstructure at the rupture strain of the sample. On the other hand, the microstructure evolution in δ ferrite started by formation of low angle grain boundaries at low strains and the density of these boundaries increased with increasing strain. There was clear evidence of continuous dynamic recrystallisation in this phase at strains beyond the peak. However, in the δ ferrite phase at high strains, most grains consisted of δ/δ and δ/γ boundaries.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2007
Copyright notice ©2007, Institute of Materials, Minerals and Mining
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007760

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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