Numerical simulation of 3D-microstructures in solidification processes based on the CAFE method  

作　　者：Jin-long Wang Fu-ming Wang Yan-yu Zhao Jiong-ming Zhang Wei Ren 

机构地区：[1]School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2009年第6期640-645,共6页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.50874007, 50774109)

摘　　要：It was analyzed that the finite element-cellular automaton （CAFE） method was used to simulate 3D-microstructures in solidification processes. Based on this method, the 3D-microstructure of 9SMn28 free-cutting steel was simulated in solidification processes and the simulation results are consistent with the experimental ones. In addition, the effects of Gaussian distribution parameters were also studied. The simulation results show that the higher the mean undercooling, the larger the columnar dendrite zones, and the larger the maximum nucleation density, the smaller the size of grains. The larger the standard deviation, the less the number of minimum grains is. However, the uniformity degree decreases first, and then increases gradually.It was analyzed that the finite element-cellular automaton （CAFE） method was used to simulate 3D-microstructures in solidification processes. Based on this method, the 3D-microstructure of 9SMn28 free-cutting steel was simulated in solidification processes and the simulation results are consistent with the experimental ones. In addition, the effects of Gaussian distribution parameters were also studied. The simulation results show that the higher the mean undercooling, the larger the columnar dendrite zones, and the larger the maximum nucleation density, the smaller the size of grains. The larger the standard deviation, the less the number of minimum grains is. However, the uniformity degree decreases first, and then increases gradually.

关 键 词：finite element-cellular automaton model numerical simulation SOLIDIFICATION 3D-microstructure Gaussian distribution parameters 

分 类 号：TU457[建筑科学—岩土工程] TG244.3[建筑科学—土工工程]