【作者】 郭洪民； 杨湘杰； 京玉海；

【Author】 H. M. Guo, Xinagjie Yang, Yuhai Jing Nanchang University 330029

【机构】 南昌大学；

【摘要】 近十年来,计算机技术的发展和精确模拟方法的出现显著促进了合金凝固微观组织模拟技术,但微观组织的空间尺度特性限制了各种模拟方法的适用范围.本文按照复杂性研究思想将元胞自动机理论和金属凝固理论相结合,改进了原有的元胞自动机模型.与经典元胞自动机模型相比,该模型考虑了溶质再分配和溶质扩散机制、界面各向异性和界面曲率对微观组织演变的影响。可较细致地模拟晶粒的结构和形态转变。更多还原

【Abstract】 In the past decades, solidification microstructure simulation of alloys has been greatly improved because of the development of computer technology and the emergence of accurate modeling methods, but the space scale characteristic of microstructure restricts the applicable range of varied modeling methods. According to ideas researching complexity, the CA theories and the Metal Solidification Theories are coupled and the classical Cellular Automaton modeling microstructure formation has been modified. The solute redistribution and solute diffusion, the effect of the surface anisotropy and surface curvature on the evolution of microstructure are considered in the present model. It can be concluded that the present model can better describe the grain structure and morphology evolution.更多还原