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Influence of the mode of deformation on recrystallisation behaviour of titanium through experiments, mean field theory and phase field model
Published in Institute of Physics Publishing
2018
Volume: 26
   
Issue: 3
Abstract
The influence of the mode of deformation on recrystallisation behaviour of Ti was studied by experiments and modelling. Ti samples were deformed through torsion and rolling to the same equivalent strain of 0.5. The deformed samples were annealed at different temperatures for different time durations and the recrystallisation kinetics were compared. Recrystallisation is found to be faster in the rolled samples compared to the torsion deformed samples. This is attributed to the differences in stored energy and number of nuclei per unit area in the two modes of deformation. Considering decay in stored energy during recrystallisation, the grain boundary mobility was estimated through a mean field model. The activation energy for recrystallisation obtained from experiments matched with the activation energy for grain boundary migration obtained from mobility calculation. A multi-phase field model (with mobility estimated from the mean field model as a constitutive input) was used to simulate the kinetics, microstructure and texture evolution. The recrystallisation kinetics and grain size distributions obtained from experiments matched reasonably well with the phase field simulations. The recrystallisation texture predicted through phase field simulations compares well with experiments though few additional texture components are present in simulations. This is attributed to the anisotropy in grain boundary mobility, which is not accounted for in the present study. © 2018 IOP Publishing Ltd Printed in the UK.
About the journal
JournalModelling and Simulation in Materials Science and Engineering
PublisherInstitute of Physics Publishing
ISSN09650393
Open AccessNo
Concepts (21)
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    Activation energy
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    Carrier mobility
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    Chemical activation
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    Deformation
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    Grain boundaries
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    Grain size and shape
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    Kinetics
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    Mean field theory
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    Microstructure
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    Phase interfaces
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    Textures
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    Torsional stress
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    GRAIN BOUNDARY MIGRATIONS
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    Grain size distribution
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    GRAIN-BOUNDARY MOBILITY
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    Mean field modeling
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    MULTI-PHASE-FIELD MODEL
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    Phase field models
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    PHASE-FIELD SIMULATION
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    RECRYSTALLISATION
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    Recrystallization (metallurgy)