用Cellular Automaton方法模拟压铸镁合金AM50的微观组织  

Microstructure Simulation of AM50 Mg Alloy Die Casting with Cellular Automaton Method

作　　者：付振南[1] 许庆彦[1] 熊守美[1] 郭志鹏[1] 

机构地区：[1]清华大学机械工程系清华-东洋镁铝合金成形技术研究开发中心,清华大学先进成形制造教育部重点实验室,北京100084

出　　处：《铸造》2007年第8期837-840,共4页Foundry

基　　金：国家重点基础研究发展计划(973计划;2006CB605208);清华-东洋镁合金成形技术研究开发中心研究项目

摘　　要：基于Cellular Automaton(CA)方法的基本原理,建立了压铸镁合金AM50形核和等轴晶粒生长的二维数学物理模型,能够对任意晶向的等轴晶晶粒生长进行模拟。模型耦合了宏观传热与微观组织模拟计算,镁合金AM50阶梯块压铸件的温度场通过热传导反算法计算求得。对阶梯块压铸件不同阶梯表面的微观组织进行了模拟,并与金相试验结果进行了对比,它们在晶粒尺寸上吻合较好。A two-dimensional mathematical-physics model for the nucleation and equiaxed grain growth of AM50 magnesium die casting alloy during solidification process were developed, which was based on the cellular automaton（CA）method. The model coupled the temperature field calculation and microstructure simulation. The temperature field of a step-shape die casting of AM50 magnesium alloy was calculated using the inverse heat transfer method. The microstructure of the surfaces at different steps of the die casting was simulated. The microstructure of the die casting was also investigated utilizing metallographic analysis. The experimental results were compared with the microstructure simulation results and they were in good agreement on grain size.

关 键 词：压铸镁合金AM50 微观组织模拟 CELLULAR Automaton方法 晶粒尺寸 

分 类 号：TG136.1[一般工业技术—材料科学与工程]