Static (Normal) Grain Growth
Elle simulation of Normal Grain Growth, driven by the reduction of grain boundary energy. Mark Jessell
Exaggerated Grain Growth
Grain growth dominated by high surface energy anisotropy, which prevents most boundaries from moving. Grains whose boundaries which can still move eventually dominate the microstructure. Note that even though the starting microstructure is a foam texture, many of the triple junctions that develop, even in the apparently stable finer grained material, do NOT evolve to 120°, which would be the equilibrium angle if there was no surface energy anisotropy. Mark Jessell