TY - GEN
T1 - A phase-field simulation of nucleation from subgrain and grain growth in static recrystallization
AU - Muramatsu, Mayu
AU - Tadano, Yuichi
AU - Shizawa, Kazuyuki
PY - 2008
Y1 - 2008
N2 - A new recrystallization phase-field method is proposed, in which the three stages of recrystallization phenomena, i.e., recovery, nucleation and nucleus growth are sequentially taken into account in a computation. From the information of subgrain patterns and crystal orientations in a polycrystal that are obtained by a dislocation-crystal plasticity FE analysis based on a reaction-diffusion model, subgrain groups surrounded by high angle boundary are found out. Next, subgrains in the group are coalesced into a nucleus by rotation of crystal orientation and migration of subgrain boundaries through a phase-field simulation. Then a computation of nucleus growth is performed also using the phase-field method on account of an autonomic incubation period of nucleation, in which stored dislocation energy assumes a role of driving force. It is shown that the present method can numerically reproduce the three stages of recrystallization as a sequence of computational procedure.
AB - A new recrystallization phase-field method is proposed, in which the three stages of recrystallization phenomena, i.e., recovery, nucleation and nucleus growth are sequentially taken into account in a computation. From the information of subgrain patterns and crystal orientations in a polycrystal that are obtained by a dislocation-crystal plasticity FE analysis based on a reaction-diffusion model, subgrain groups surrounded by high angle boundary are found out. Next, subgrains in the group are coalesced into a nucleus by rotation of crystal orientation and migration of subgrain boundaries through a phase-field simulation. Then a computation of nucleus growth is performed also using the phase-field method on account of an autonomic incubation period of nucleation, in which stored dislocation energy assumes a role of driving force. It is shown that the present method can numerically reproduce the three stages of recrystallization as a sequence of computational procedure.
KW - Grain growth
KW - High angle boundary
KW - Misorientation
KW - Nucleation
KW - Phase-field method
KW - Static recrystallization
KW - Subgrain pattern
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U2 - 10.4028/www.scientific.net/msf.584-586.1045
DO - 10.4028/www.scientific.net/msf.584-586.1045
M3 - Conference contribution
AN - SCOPUS:56349149133
T3 - Materials Science Forum
SP - 1045
EP - 1050
BT - Materials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
PB - Trans Tech Publications Ltd
T2 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
Y2 - 18 August 2008 through 22 August 2008
ER -