Hn. Lee et al., Monte Carlo simulation of microstructure evolution based on grain boundarycharacter distribution, MAT SCI E A, 281(1-2), 2000, pp. 176-188
A Monte Carlo simulation of microstructure evolution was conducted with emp
hasis on grain growth anomaly and texture formation arising from grain boun
dary characteristics. Microstructures consisting of strategically varied gr
ain size, grain boundary mobility and texture components were generated. It
was found that the initial grain size was of the most significant paramete
r that determines the topographical properties of the final microstructure.
Contrary to some observations and expectations, high-energy grain boundari
es of high mobility did not necessarily vanish first but sometimes persiste
d and even increased in areal fraction depending on the local distribution
of characteristics. In a microstructure with two texture components, an abn
ormal gain growth occurred when a large grain with high mobility selectivel
y grew consuming surrounding small grains. From the analysis of the variati
on of grain boundary fraction and associated energy reduction, it was concl
uded that minimization of the total energy of the system. instead of the lo
cal instability, governed the evolution characteristics of the microstructu
re. Published by Elsevier Science S.A.