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Effect of isothermal dissolution and re-precipitation of austenite on the mechanical properties of duplex structures

Dehghan-Manshadi, Ali, Shokouhi, Alireza and Hodgson, Peter D. 2010, Effect of isothermal dissolution and re-precipitation of austenite on the mechanical properties of duplex structures, Materials science and eMaterials science and engineering A : structural materials : properties, microstructures and processing, vol. 527, no. 24-25, pp. 6765-6770.

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Title Effect of isothermal dissolution and re-precipitation of austenite on the mechanical properties of duplex structures
Author(s) Dehghan-Manshadi, Ali
Shokouhi, Alireza
Hodgson, Peter D.
Journal name Materials science and eMaterials science and engineering A : structural materials : properties, microstructures and processing
Volume number 527
Issue number 24-25
Start page 6765
End page 6770
Publisher Elsevier S.A.
Place of publication Lausanne, Switzerland
Publication date 2010-09-25
ISSN 0921-5093
1873-4936
Keyword(s) phase transformations
hot deformation
recrystallization
stainless steel
EBSD
Summary The hot deformation behaviour of a duplex ferritic/austenitic stainless steel was studied after different deformation conditions. The results showed a strange and interesting behaviour in the strength of the material during post-deformation studies. For most deformation conditions, the flow stress of the material was un-expectedly increased after annealing of deformed structures. This phenomenon implied that microstructural hardening occurred in the material during the interpass annealing rather than the expected softening. Also, an interesting change was observed where the morphology of the austenite phase changed from stringers or layers of austenite to a widmanstätten structure. The microstructural studies suggest that the austenite was dissolved and re-precipitated during the annealing process and the hardening was mostly associated with the change in the morphology of austenite.
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30034386

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