Modelling microstructural evolution during annealing of inhomogeneously deformed material

ISSN： 1743-2847

Source： Materials Science and Technology, Vol.19, Iss.2, 2003-02, pp. : 173-177

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

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.