Simulation of discontinuous dynamic recrystallization in pure Cu using a probabilistic cellular automaton
Hallberg, Håkan LU
; Wallin, Mathias
LU
and Ristinmaa, Matti
LU
(2010)
In Computational Materials Science
49(1).
p.25-34
- Abstract
- A cellular automaton algorithm with probabilistic cell switches is employed in the simulation of dynamic discontinuous recrystallization. Recrystallization kinetics are formulated on a microlevel where, once nucleated, new grains grow under the driving pressure available from the competing processes of stored energy minimization and boundary energy reduction. Simulations of the microstructural changes in pure Cu under hot compression are performed where the influence of different thermal conditions are studied. The model is shown to capture both the microstructural evolution in terms of grain size and grain shape changes and also the macroscopic flow stress behavior of the material. The latter gives the expected transition from single- to... (More)
- A cellular automaton algorithm with probabilistic cell switches is employed in the simulation of dynamic discontinuous recrystallization. Recrystallization kinetics are formulated on a microlevel where, once nucleated, new grains grow under the driving pressure available from the competing processes of stored energy minimization and boundary energy reduction. Simulations of the microstructural changes in pure Cu under hot compression are performed where the influence of different thermal conditions are studied. The model is shown to capture both the microstructural evolution in terms of grain size and grain shape changes and also the macroscopic flow stress behavior of the material. The latter gives the expected transition from single- to multiple-peak serrated flow with increasing temperature. Further, the effects on macroscopic flow stress by varying the initial grain size is analyzed and the model is found to replicate the shift towards more serrated flow as the initial grain size is reduced. Conversely, the flow stress is stabilized by larger initial grain sizes. The extent of recrystallization as obtained from simulations are compared to classical JMAK theory and proper agreement with theory is established. In addition, by tracing the strain state during the simulations, a post-processing step is devised to obtain the macroscopic deformation of the cellular automaton domain, giving the expected deformation of the equiaxed recrystallized grains due to the macroscopic compression. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1614299
- author
- Hallberg, Håkan
LU
; Wallin, Mathias
LU
and Ristinmaa, Matti
LU
- organization
- publishing date
- 2010
- type
- Contribution to specialist publication or newspaper
- publication status
- published
- subject
- keywords
- Hot compression, Recrystallization, Cellular automaton, Copper
- in
- Computational Materials Science
- volume
- 49
- issue
- 1
- pages
- 25 - 34
- publisher
- Elsevier
- external identifiers
-
- wos:000279858400005
- scopus:77955281667
- ISSN
- 0927-0256
- DOI
- 10.1016/j.commatsci.2010.04.012
- project
- Multiscale modeling of recrystallization
- language
- English
- LU publication?
- yes
- id
- dcdbfc53-5e80-424d-b81a-38e65da250f0 (old id 1614299)
- date added to LUP
- 2016-04-01 13:09:02
- date last changed
- 2022-12-09 15:09:26
@misc{dcdbfc53-5e80-424d-b81a-38e65da250f0,
abstract = {{A cellular automaton algorithm with probabilistic cell switches is employed in the simulation of dynamic discontinuous recrystallization. Recrystallization kinetics are formulated on a microlevel where, once nucleated, new grains grow under the driving pressure available from the competing processes of stored energy minimization and boundary energy reduction. Simulations of the microstructural changes in pure Cu under hot compression are performed where the influence of different thermal conditions are studied. The model is shown to capture both the microstructural evolution in terms of grain size and grain shape changes and also the macroscopic flow stress behavior of the material. The latter gives the expected transition from single- to multiple-peak serrated flow with increasing temperature. Further, the effects on macroscopic flow stress by varying the initial grain size is analyzed and the model is found to replicate the shift towards more serrated flow as the initial grain size is reduced. Conversely, the flow stress is stabilized by larger initial grain sizes. The extent of recrystallization as obtained from simulations are compared to classical JMAK theory and proper agreement with theory is established. In addition, by tracing the strain state during the simulations, a post-processing step is devised to obtain the macroscopic deformation of the cellular automaton domain, giving the expected deformation of the equiaxed recrystallized grains due to the macroscopic compression.}},
author = {{Hallberg, Håkan and Wallin, Mathias and Ristinmaa, Matti}},
issn = {{0927-0256}},
keywords = {{Hot compression; Recrystallization; Cellular automaton; Copper}},
language = {{eng}},
number = {{1}},
pages = {{25--34}},
publisher = {{Elsevier}},
series = {{Computational Materials Science}},
title = {{Simulation of discontinuous dynamic recrystallization in pure Cu using a probabilistic cellular automaton}},
url = {{https://lup.lub.lu.se/search/files/3188157/4187050.pdf}},
doi = {{10.1016/j.commatsci.2010.04.012}},
volume = {{49}},
year = {{2010}},
}