Paper Titles
Phase Field Model Simulation of Grain Growth in Three Dimensions under Isotropic and Anisotropic Grain Boundary Energy Conditions
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Three Dimensional Monte Carlo Simulation of Isotropic Coarsening of Particles in Liquid Phase
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On Strain-Induced Grain Growth Using Modified Monte Carlo Method and Digital Image Correlation Technique
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Prediction of the Microstructural Evolution during Hot Strip Rolling of Nb Microalloyed Steels
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Numerical Modelling of Plastic Deformation and Subsequent Recrystallization in Polycrystalline Materials, Based on a Digital Material Framework
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Prediction of the Microstructural Evolution during Hot Strip Rolling of Nb Microalloyed Steels

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Abstract:

A physically based model is used to describe the microstructural evolution of Nb microalloyed steels during hot rolling. The model is based on a physical description of dislocation density evolution, where the generation and recovery of dislocations determines the flow stress and also the driving force for recrystallization. In the model, abnormally growing subgrains are assumed to be the nuclei of recrystallized grains and recrystallization starts when the subgrains reach a critical size and configuration. The model is used to predict the flow stress during rolling in SSAB Tunnplåt’s hot strip mill. The predicted flow stress in each stand was compared to the stresses calculated by a friction-hill roll-force model. Good fit is obtained between the predicted values by the microstructure model and the measured mill data, with an agreement generally within the interval ±15%.

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Periodical:

Materials Science Forum (Volumes 558-559)

Pages:

1127-1132

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.558-559.1127

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Online since:

October 2007

Authors:

Linda Lissel, Göran Engberg

Keywords:

Hot Rolling, Modeling, Recrystallization

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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