Impact of grain boundary character on grain rotation

Atomistic simulations of interaction of edge dislocation with twist grain boundaries in Al-effect of temperature and boundary misorientation

“…Their simulations showed no significant difference in the force experienced by the dislocations due to GBs at 0K and 300K. At elevated temperatures, majority of the studies have focused either on GB structures [24,25], energies [26] or the phenomena like GB sliding [27,28]. Hence, the studies relating the effect of GB misorientation angle and temperature on the mechanical behavior of bicrystalline metals, are still limited.…”

Grain-resolved kinetics and rotation during grain growth of nanocrystalline Aluminium by molecular dynamics

“…However, other experimental studies [91] have not observed this concomitant grain migration and rotation in systems closer to the simulated ones, where rotation is thought to be more prominent. In fact, in previous simulation studies [66,92], we showed that rotation is strongly dependent on the character of the grain boundary. Furthermore, most of the computational studies have been performed in bi-or tricrystals [88] and with CSL grain boundaries as a necessity to fulfill periodicity on all surfaces of the simulation setups.…”

“…This is a topic of interest because Cahn and Taylor [87] predicted that rotation of grains can be caused by the motion of grain boundaries. Several simulation studies [64,65,88,66,26] and some experimental ones [89,90,91] have confirmed this effect for stressed nanocrystalline polycrystals. However, other experimental studies [91] have not observed this concomitant grain migration and rotation in systems closer to the simulated ones, where rotation is thought to be more prominent.…”

“…Nevertheless, this approach has been successfully utilized in numerous simulations to track, for instance, grain boundaries [59,52,53,60,61] and grain rotation [62,63,64,65,66].…”

Shrinkage mechanisms of grain boundary loops in two-dimensional colloidal crystals

“…In absence of an external driving force, the migration of GBs is generally attributed to capillary forces induced by their own curvature [2,3]. However, due to the mismatch of the two adjacent crystals, GBs possess a dislocation structure that is affected during their migration and annihilation, via dislocation reactions [4][5][6]. This additional complexity may lead to other modes of GB motion, such as grain rotation or coupling between migration and rotation [7], the relative contributions of which remain unclear.…”