barnett-correlationbetween-2008.pdf (146.33 kB)
Correlation between the deformation and post-deformation softening behaviours in hot worked Austenite
journal contribution
posted on 2008-01-01, 00:00 authored by A Dehghan-Manshadi, J Jonas, Peter HodgsonPeter Hodgson, Matthew BarnettMatthew BarnettThe 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.
History
Journal
ISIJ InternationalVolume
48Issue
2Pagination
208 - 211Publisher
Iron and Steel Institute of JapanLocation
Tokyo, JapanLink to full text
ISSN
0915-1559eISSN
1347-5460Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2008, Iron and Steel Institute of JapanUsage metrics
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No categories selectedKeywords
stainless steelgrain sizemicrostructuredynamical recrystallizationaustenitestrain softeningmechanical propertieshot deformationScience & TechnologyTechnologyMetallurgy & Metallurgical Engineeringdynamic recrystallizationpeak straintransition strainMETADYNAMIC RECRYSTALLIZATIONALPHA-IRONTRANSITIONKINETICS
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