Scaling behavior of grain-rotation-induced grain growth.
Recent investigations of grain growth in nanocrystalline materials have revealed a new growth mechanism: grain-rotation-induced grain coalescence. Based on a simple model employing a stochastic theory and using computer simulations, here we investigate the coarsening of a polycrystalline microstructure due solely to the grain-rotation coalescence mechanism. Our study demonstrates that this mechanism exhibits power-law growth with a universal scaling exponent. The value of this universal growth exponent is shown to depend on the assumed mechanism by which the grain rotations are accommodated.
Moldovan
Dorel
D
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Yamakov
Vesselin
V
Wolf
Dieter
D
Phillpot
Simon R
SR