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AA1050의 정적 재결정에 대한 셀룰라 오토마타 모델링
김동규(D. K. Kim),이호원(H. W. Lee),정경환(K. H. Jung),임용택(Y. T. Im) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
In the present investigation, a two dimensional probabilistic cellular automata (CA) model is used to simulate primary recrystallization of cold rolled AA1050. Electron backscatter diffraction measurement data is used as an input for the simulation to consider highly heterogeneous distribution of the stored energy and orientations over the initial microstructure. Nucleation process is assumed to be site-saturated. To contemplate anisotropic property of grain boundary migration, the grain boundary mobilitywas represented as a function of misorientation and the pressure was expressed as a function of dislocation density difference, curvature, and misorientation. The results of CA simulations were then compared with the Johnson-Mehl-Avrami-Kolmogorov (JMAK) theory in order to investigate the effects of nucleation criteria and curvature-driven pressure on the microstructure and the kinetics of primary recrystallization.