异常晶粒长大的Monte Carlo模拟方法  

Monte Carlo simulation of abnormal grain growth

作　　者：高英俊[1] 金星[1] 苏义勇[1] 黄创高[1] 魏承炀[1] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2009年第2期220-225,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50061001;5066001);广西科学基金资助项目(桂科自0832029;桂科基0342004-1;0639004)

摘　　要：采用Radhakrishnan等改进后的Monte Carlo方法,模拟了两种能量结构下的异常晶粒长大过程.研究结果发现,在相同参数下用改进算法模拟异常晶粒长大比Srolovitz和Grest等人的模拟所得到的效率高,而且结果比后者与实际符合得更好.在两种能量结构下,异常晶粒长大的趋势相同,随着J1/J2值的增大,晶粒长大指数有所增加,异常晶粒的体积百分比曲线都出现平台阶段.在相同参数下,第二种能量结构的异常晶粒长大的速率比较快.Monte Carlo method improved by Radhakrishnan et al. was used to simulation abnormal grain growth process under two energy structures. The results show that comparing with the DJ Srolovitz and GS Grest＇ s method, improved Monte Carlo simulation algorithm receives higher efficiency and the result is well in line with reality under the same parameters. In both the energy structure, abnormal grain growth has the same trend, and the grain size has increased exponentially with J1/J2 ratio. The percentage of abnormal grain size of platform stage are similar under two different parameters, but in the same parameters, the abnormal grain of the second energy struc- ture grows much faster.

关 键 词：异常晶粒 晶粒度 MONTE CARLO方法 晶粒长大 

分 类 号：TB115[理学—数学]