铸造合金凝固组织的计算机模拟与预测  

Computer Modeling and Prediction of Solidified Microstructure of Casting Alloy

作　　者：许庆彦[1] 柳百成[1] 

机构地区：[1]清华大学,北京100084

出　　处：《稀有金属材料与工程》2003年第6期401-406,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金重大项目(59990473);国家重点基础研究规划项目(G2000067208-3);清华大学基础研究基金资助

摘　　要：数值模拟技术与计算机技术的迅速发展,使凝固过程的数值模拟正在由宏观向微观转变。微观模拟不仅可以得到材料的凝固组织,而且还能为宏观模拟提供准确的潜热释放信息。对宏观和微观现象的完整耦合可以使我们对铸造凝固过程作出更加准确的模拟预测。针对目前微观组织模拟的研究现状,介绍了几种主要的模拟研究方法,如确定性模拟方法、随机性模拟方法和相场方法等,阐述了其主要特征和模拟微观组织时存在的优缺点,并给出了各种模拟方法的计算实例。由于凝固组织数值模拟的复杂性,对其进行深入的研究是必要的,也是未来计算材料科学的重要发展方向。最后对微观模拟中的问题及发展方向作了分析。With the development of numerical technique and computer technology, the numerical modeling of the solidification process is changing from macro-to micro-modeling. By micro-modeling not only the solidified microstructure of materials can be predicted, but also the accurate information of latent heat releasing can be provided for the macro-modeling. The complete coupling of macro- and micro-modeling can result in a more accurate prediction for the solidification process of casting alloys. In the paper the state-of-art of the microstructure simulation was given in order to describe the main methods of micro-modeling, such as deterministic, stochastic and phase-field modeling, etc. Because of the complexity of numerical simulation of the solidification microstructure, it is necessary to study deeply the microstructure simulation, which would be the important research orientation in the field of computational materials science. Finally, the existent problem and the future developing orientation were analyzed.

关 键 词：宏观模拟 微观模拟 凝固组织 确定性模拟 随机性模拟 相场方法 

分 类 号：TG248[金属学及工艺—铸造]