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Analysis of work hardening and recrystallization during the hot working of steel using a statistically based internal variable model
journal contribution
posted on 2003-01-02, 00:00 authored by C Roucoules, M Pietrzyk, Peter HodgsonPeter HodgsonA 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.
History
Journal
Materials science and engineering AVolume
339Issue
1-2Pagination
1 - 9Publisher
Elsevier SequoiaLocation
Lausanne, SwitzerlandPublisher DOI
ISSN
0921-5093eISSN
1873-4936Language
engNotes
Available online 29 March 2002.Publication classification
C1 Refereed article in a scholarly journalCopyright notice
2003, Published by Elsevier Science B.V.Usage metrics
Keywords
metadynamic recrystallizationstress–strain relationshipZener–Hollomon parameterScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials Sciencestress-strain relationshipZener-Hollomon parameterDYNAMIC RECRYSTALLIZATIONPOLYCRYSTALLINE NICKELHIGH-TEMPERATURESSTRAIN RATESAUSTENITERECOVERYKINETICSFLOWMechanical Engineering
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