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Correlation between the deformation and post-deformation softening behaviours in hot worked Austenite

Dehghan-Manshadi, Ali, Jonas, John J., Hodgson, Peter and Barnett, Mathew 2008, Correlation between the deformation and post-deformation softening behaviours in hot worked Austenite, ISIJ International, vol. 48, no. 2, pp. 208-211.

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Title Correlation between the deformation and post-deformation softening behaviours in hot worked Austenite
Author(s) Dehghan-Manshadi, Ali
Jonas, John J.
Hodgson, Peter
Barnett, Mathew
Journal name ISIJ International
Volume number 48
Issue number 2
Start page 208
End page 211
Total pages 4
Publisher Iron and Steel Institute of Japan
Place of publication Tokyo, Japan
Publication date 2008
ISSN 0915-1559
1347-5460
Keyword(s) stainless steel
grain size
microstructure
dynamical recrystallization
austenite
strain softening
mechanical properties
hot deformation
Summary The relation between the deformation and post-deformation softening behaviours of austenite is examined in a 304 stainless steel. This correlation has been exploited in the modelling of hot rolling and it is argued here that the key to this understanding lies in the deformation structure. The latter is characterized in the present work by the fraction of dynamic recrystallization. The value of this fraction at the peak in the flow stress curve is found to decrease with increasing stress (i.e. with decreasing temperature and increasing strain rate). By contrast, the fraction of dynamic  recrystallization at the strain corresponding to the point where  post-deformation softening becomes strain independent is found to be constant. These observations are used to explain the nature of the important difference between the flow curve peak and the onset of strain independent post-deformation softening.
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 2008
Copyright notice ©2008, Iron and Steel Institute of Japan
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017241

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