TY - JOUR
T1 - Phase-field simulation of recrystallization based on the unified subgrain growth theory
AU - Suwa, Yoshihiro
AU - Saito, Yoshiyuki
AU - Onodera, Hidehiro
PY - 2008/12
Y1 - 2008/12
N2 - The effects of the microstructural inhomogeneities created in the deformed state on recrystallization kinetics have been investigated by using phase-field (PF) simulations. Numerical simulations of static recrystallization have been performed in two-dimensional polycrystalline structures by coupling the unified subgrain growth theory with PF methodology. Simple assumptions based on experimental observations have been utilized for preparing the initial microstructures. The following results have been obtained: (1) The transition from continuous to discontinuous recrystallization is successfully reproduced by simulations in which the inter-subgrain misorientation, 〈 θ 〉, varies and the initial mean subgrain radius, 〈 R0 〉, and the total number of pre-existing grains, N, are kept constant. (2) For discontinuous recrystallization, the initiation occurred faster and the termination time reduced with a decrease in 〈 R0 〉. (3) We have confirmed that a significant increase in the fraction of high-angle grain boundaries suppressed the discontinuous recrystallization. (4) We have proposed microstructural entropy as an indicator of the discontinuity of recrystallization based on the subgrain size distribution.
AB - The effects of the microstructural inhomogeneities created in the deformed state on recrystallization kinetics have been investigated by using phase-field (PF) simulations. Numerical simulations of static recrystallization have been performed in two-dimensional polycrystalline structures by coupling the unified subgrain growth theory with PF methodology. Simple assumptions based on experimental observations have been utilized for preparing the initial microstructures. The following results have been obtained: (1) The transition from continuous to discontinuous recrystallization is successfully reproduced by simulations in which the inter-subgrain misorientation, 〈 θ 〉, varies and the initial mean subgrain radius, 〈 R0 〉, and the total number of pre-existing grains, N, are kept constant. (2) For discontinuous recrystallization, the initiation occurred faster and the termination time reduced with a decrease in 〈 R0 〉. (3) We have confirmed that a significant increase in the fraction of high-angle grain boundaries suppressed the discontinuous recrystallization. (4) We have proposed microstructural entropy as an indicator of the discontinuity of recrystallization based on the subgrain size distribution.
KW - Bulging
KW - Computer simulation
KW - Continuous Recrystallization
KW - Discontinuous recrystallization
KW - Phase-field modeling
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U2 - 10.1016/j.commatsci.2008.03.025
DO - 10.1016/j.commatsci.2008.03.025
M3 - Article
AN - SCOPUS:55649088027
VL - 44
SP - 286
EP - 295
JO - Computational Materials Science
JF - Computational Materials Science
SN - 0927-0256
IS - 2
ER -