Modelling microstructural evolution during annealing of inhomogeneously deformed material
Authors: Rettenmayr, M.; Song, X.
Source: Materials Science and Technology, Volume 19, Number 2, February 2003 , pp. 173-177(5)
Publisher: Maney Publishing
Abstract:A recently developed deterministic/Monte Carlo model is used for studying the interaction between recovery and recrystallisation under various annealing conditions after inhomogeneous deformation. Locally, the changes of the stored energy during annealing as well as the temperature and time dependence of the recrystallisation kinetics are investigated in a parameter study. A higher annealing temperature has a twofold effect on the recrystallisation process: on the one hand there is a higher nucleation rate, on the other hand the concomitant process of recovery reduces the driving force for both the formation and growth of the recrystallising nuclei. In the present work, the evolution of microstructure is simulated as a function of the annealing temperature over a wide range. Graded recrystallised microstructures, as found in former experiments with cold drawn titanium rods, are reproduced by simulations. Evaluations of grain size gradient and recrystallised fraction (recrystallisation depth inwards from the edge of the rods) in experimental and simulated microstructures are in good agreement.
Document Type: Regular Paper
Publication date: February 2003
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