多晶材料晶粒生长的计算机模拟研究

多晶固体材料显微结构的演化与诸多因素密切相关 ,是一复杂的过程。运用适当的计算机模拟方法进行模拟 ,实现对晶粒生长的预测 ,可为材料研究提供新的方法和重要依据。此文以晶粒生长动力学为基础 ,建立晶粒生长模型 ;分析了晶粒生长过程的计算机模拟理论和方法 ;以MonteCarlo方法为基础 ,提出快速Q statepotts算法 ,简化计算量 ,在PC机上编程实现了正常晶粒生长过程的计算机模拟。得到的显微结构图逼真度较好。通过对结果进行分析处理 ,得到的生长因子为 0 .4 7。

Computer simulation of grain growth of polycrystalline material

The microstructure evolution of the polycrystalline solids is a complex procedure, which is a function of many factors. Completing the prediction of grain growth simulated by computer using proper methods can provide new study methods and important foundations for material research. Grain growth models have been constructed on the basis of detailed studying about the procedure of grain growth. The theories and methods of grain growth have also been emphatically analyzed respectively. Quick Q state Potts algorithm which based on Monte Carlo method are used here in order to simplify the computer calculations. We have accomplished the computer simulation of normal grain growth by making program on personal computer. The microstructures obtained are similar to which got from the experiments. The growth exponent got by dealing with our results is 0.47.