【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.更多还原

【Abstract】 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.更多还原