6533b851fe1ef96bd12aa007
RESEARCH PRODUCT
Dominance of microstructural processes and their effect on microstructural development: insights from numerical modelling of dynamic recrystallization
Cees W. PasschierLynn EvansSandra PiazoloPaul D. BonsMark Jessellsubject
Lattice (order)Dynamic recrystallizationNucleationThermodynamicsGeologyOcean EngineeringGrain boundaryCrystalliteGrain boundary migrationMicrostructureGeologyWater Science and Technologydescription
The influence of the dominance of different processes on the microstructural development of a quarzite has been numerically modelled using the modelling system Elle. In the model dynamic recrystallization of a polycrystalline aggregate has been simulated by a combination of viscous deformation, lattice rotation, subgrain formation, rotation recrystallization, nucleation of new grains and recovery. Different combinations of the dominance of processes are considered by variations in values of the grain boundary mobility and the energy threshold value for recrystallization by nucleation of new grains. In addition, two different starting microstructures (fine and coarse grained) are used. Results show that groups of specific microstructural characteristics can be distinguished which depend on the relative rates and dominance of grain boundary migration, rotational recrystallization, recrystallization by nucleation and viscous deformation. Comparison and combination of our results with experimental data and observations in natural examples may provide the possibility to interpret microstructures quantitatively in terms of temperature and strain rates. Abbrev. Title: Microstructural development – Simulations
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-01-01 | Geological Society, London, Special Publications |