中文摘要：

材料微观组织结构决定材料的宏观力学性能。Potts模型是实现晶粒生长过程仿真的一种重要方法。在Radhakrishnan和Zacharia提出的MonteCarlo算法的基础上提出了一种改进的MonteCarlo算法，利用该算法对晶粒生长过程进行了模拟，模拟的微观组织多为等轴晶，晶粒生长指数为0．512。模拟结果表明，该算法能够准确模拟晶粒生长过程。

英文摘要：

The mechanical properties of materials are dependant on the microstructure including grain size, porosity, and texture networks and so forth. One of the important simulation models of microstructural evolution is Potts model which is solved by Monte Carlo algorithm. The new improved Monte Carlo algorithm is proposed on the basis of the Monte Carlo algorithm proposed by Radhakrishnan and Zacharia, Grain growth is simulated with the new improved Monte Carlo algorithm. The simulated grain growth exponent is 0. 512, which is close to the theoretical value. The simulated topological microstructure is similar with that of the real material,