【摘要】 设计两种可由不同参量的Weibull尺寸分布函数表达的晶粒组织作为初始态,采用Potts Monte Carlo方法对它们进行晶粒长大过程的仿真,结果表明,进入准稳态长大阶段后,两种组织的晶粒尺寸分布几乎同趋于另一种Weibull分布,而不是经典Hillert理论预测的Hillert(尺寸分布因子v=4)分布,该准稳态的晶粒尺寸分布也可用v<4的解析函数近似表示,从而为v<4的准稳态晶粒尺寸分布的存在提供了仿真实验证据。更多还原

【Abstract】 Monte Carlo simulations were performed to investigate the process of the normal grain growth starting from two microstructures, the grain size distributions of which could be well described by the Weibull function with different parameters. The results show that, during the quasi-stationary state stage, the grain size distributions of the two microstructures seemly approach to a similar distribution, which is quite different from the Hillert (v=4) distribution. However, the Weibull function with a parameter different from that of the initial fits the grain size distribution well. Meanwhile it can also be well described by the analytical solution, where v is smaller than 4.更多还原