Grain growth rate for coupled grain boundary migration and grain rotation in nanocrystalline materials

Grain Orientation Induced Softening in Electrodeposited Gradient Nanostructured Nickel during Cold Rolling Deformation

“…The main reason for this decrease could be attributed to the negative effect of grain growth on peak broadening. Under stress, tiny grains are easily grown due to grain rotation and the coalescence mechanism [24][25][26][27]. Relative to grains with medium and large sizes, grain rotation activity is significantly more pronounced, which is confirmed by the change of I 111 /I 200 , as shown in Figure 6.…”

Unveiling the mechanism of phase and morphology selections during the devitrification of Al-Sm amorphous ribbon

“…During the early stage when a nucleus is fully embedded in the parent amorphous phase, the growth kinetics is controlled by the difference between the attachment and detachment rates at the interface [55], which results in a linear growth rate α: dR/dt = α, where R is the average nuclei radius. During the second stage, when nuclei impinge on each other, the crystal growth is controlled by the migration through curvature-driven grain boundary motion [56]. Both Monte Carlo simulations based on the Potts model and phase-field modeling [57] demonstrated that parabolic growth law (R 2 ∼ t) is satisfied in this scenario, or in the differential form: dR/dt = β/R, where β is a constant.…”

Quantized Grain Boundary States Promote Nanoparticle Alignment During Imperfect Oriented Attachment

“…In the context of nanograin growth in bulk NC materials (e.g. during sintering), phenomenological models have assumed that grain rotation occurs by (i), the diffusion of atoms within the GB to accommodate changes in GB structure [25][26][27][28] . Further, these models assume the driving force for rotation follows the continuum Read-Shockley model for the change in GB energy [22][23][24][25] .…”