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Analysis of work hardening and recrystallization during the hot working of steel using a statistically based internal variable model

Roucoules, C., Pietrzyk, M. and Hodgson, Peter 2003, Analysis of work hardening and recrystallization during the hot working of steel using a statistically based internal variable model, Materials science and engineering A, vol. 339, no. 1-2, pp. 1-9, doi: 10.1016/S0921-5093(02)00120-X.

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Title Analysis of work hardening and recrystallization during the hot working of steel using a statistically based internal variable model
Author(s) Roucoules, C.
Pietrzyk, M.
Hodgson, Peter
Journal name Materials science and engineering A
Volume number 339
Issue number 1-2
Start page 1
End page 9
Publisher Elsevier Sequoia
Place of publication Lausanne, Switzerland
Publication date 2003-01-02
ISSN 0921-5093
1873-4936
Keyword(s) metadynamic recrystallization
stress–strain relationship
Zener–Hollomon parameter
Summary A mathematical model has been developed which describes the hot deformation and recrystallization behavior of austenite using a single internal variable: dislocation density. The dislocation density is incorporated into equations describing the rate of recovery and recrystallization. In each case no distinction is made between static and dynamic events, and the model is able to simulate multideformation processes. The model is statistically based and tracks individual populations of the dislocation density during the work-hardening and softening phases. After tuning using available data the model gave an accurate prediction of the stress–strain behavior and the static recrystallization kinetics for C–Mn steels. The model correctly predicted the sensitivity of the post deformation recrystallization behavior to process variables such as strain, strain rate and temperature, even though data for this were not explicitly incorporated in the tuning data set. In particular, the post dynamic recrystallization (generally termed metadynamic recrystallization) was shown to be largely independent of strain and temperature, but a strong function of strain rate, as observed in published experimental work.
Notes Available online 29 March 2002.
Language eng
DOI 10.1016/S0921-5093(02)00120-X
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2003, Published by Elsevier Science B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30006472

Document type: Journal Article
Collection: School of Engineering and Technology
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