TY - JOUR
T1 - Rotation-induced grain growth and stagnation in phase-field crystal models
AU - Bjerre, Mathias
AU - Tarp, Jens Magelund
AU - Angheluta, Luiza
AU - Mathiesen, Joachim
PY - 2013/8/15
Y1 - 2013/8/15
N2 - We consider grain growth and stagnation in polycrystalline microstructures. From the phase-field crystal modeling of the coarsening dynamics, we identify a transition from a grain-growth stagnation upon deep quenching below the melting temperature Tm to a continuous coarsening at shallower quenching near Tm. The grain evolution is mediated by local grain rotations. In the deep quenching regime, the grain assembly typically reaches a metastable state where the kinetic barrier for recrystallization across boundaries is too large and grain rotation with subsequent coalescence or boundary motion is infeasible. For quenching near Tm, we find that the grain growth depends on the average rate of grain rotation, and follows a power-law behavior with time, with a scaling exponent that depends on the quenching depth.
AB - We consider grain growth and stagnation in polycrystalline microstructures. From the phase-field crystal modeling of the coarsening dynamics, we identify a transition from a grain-growth stagnation upon deep quenching below the melting temperature Tm to a continuous coarsening at shallower quenching near Tm. The grain evolution is mediated by local grain rotations. In the deep quenching regime, the grain assembly typically reaches a metastable state where the kinetic barrier for recrystallization across boundaries is too large and grain rotation with subsequent coalescence or boundary motion is infeasible. For quenching near Tm, we find that the grain growth depends on the average rate of grain rotation, and follows a power-law behavior with time, with a scaling exponent that depends on the quenching depth.
U2 - 10.1103/PhysRevE.88.020401
DO - 10.1103/PhysRevE.88.020401
M3 - Journal article
SN - 1539-3755
VL - 88
JO - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)
JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)
IS - 2
M1 - 020401
ER -