不同尺寸二相粒子材料晶粒长大元胞自动机仿真.pdfVIP

第 18 卷第 7 期 中国有色金属学报 2008 年 7 月 Vol.18 No.7 The Chinese Journal of Nonferrous Metals Jul. 2008 文章编号：1004-0609(2008)07-1305-06 不同尺寸二相粒子材料晶粒长大的元胞自动机仿真 麻晓飞，关小军，刘运腾，申孝民，王丽君，宋述同，曾庆凯 (山东大学 材料科学与工程学院，济南 250061) 摘 要：在现有晶粒长大元胞自动机器(CA)模型的基础上制定新的转变规则，使之能够模拟第二相粒子对晶粒长 大过程的影响，且对含有不同尺寸第二相粒子材料的晶粒长大过程进行仿真模拟和定量分析。模拟结果表明：第 二相粒子对基体组织具有钉扎作用，当粒子体积分数一定时，总体钉扎作用随着粒子尺寸的减小而增强；对于单 一粒子而言，大尺寸粒子比小尺寸粒子具有更强的钉扎效果，该结果能够准确地反映第二相粒子对晶粒长大过程 的影响规律，与现有的相关理论相符合。 关键词：元胞自动机；计算机模拟；晶粒长大；第二相粒子；钉扎 中图分类号：TG111 ；TP391 文献标识码：A Simulation of second phase particles with different sizes on grain growth process MA Xiao-fei, GUAN Xiao-jun, LIU Yun-teng, SHEN Xiao-min, WANG Li-jun, SONG Shu-tong, ZENG Qing-kai (College of Materials Science and Engineering, Shandong University, Jinan 250061, China) Abstract: Based on the ordinary grain growth cellular automaton(CA) model, a novel transition rule was established to simulate the influence of second-phase particle size on grain growth process. The influences of second-phase particles with various sizes on grain growth process in the matrix of a two-phase material were simulated and quantitatively analyzed. The results show that the evolution of the microstructure will be pinned by the second phase particle. When the volume fraction of particle is fixed, the effect of pin of the particles increase with the decrease of the particle size. And for a single particle, the influence of large one will be bigger than that of the small one for the single particle. The quantitative relation between grain growth and the second-phase particle size obtained from the