一种自相似二维晶粒长大过程的Monte Carlo仿真  

A Monte Carlo Simulation of Two-dimensional Grain Growth Process with Self-Similar Size Distribution

作　　者：王超[1] 刘国权[1] 秦湘阁[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《北京科技大学学报》2003年第3期226-229,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金项目资助课题(No.50171008)

摘　　要：采用Monte Carlo方法仿真了以Weibull尺寸分布为初始组织的正常晶粒长大过程.结果显示,二维正常晶粒长大发展到准稳态长大阶段时,其晶粒尺寸分布不是经典Hillert理论所预测的尺寸分布,而是仍然保持Weibull分布,并且参数基本不发生变化.与国际上同类研究成果的比较进一步表明,不同β值的Weibull分布很适用于表征二维晶粒长大的准稳态晶粒尺寸分布,且表征效果优于文献中的已有工作.To investigate the effect of initial grain size distribution on normal grain growth, Monte Carlo simulation was performed starting from an initial microstructure with the Weibull grain size distribution in two-dimension. The results show that the grain structure evolved alike with the initial, and the grain size distribution of the quasi-stationary state could be described well by the Weibull function but not by classical Hillert distribution. Comparison with some other results further suggests that Weibull distribution with different B values may well be used to describe the quasi-stationary grain size distribution.

关 键 词：晶粒长大 MonteCarlo仿真 自相似二维过程 尺寸分布 WEIBULL分布 显微组织演化 

分 类 号：O781[理学—晶体学] TP391.9[自动化与计算机技术—计算机应用技术]