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首页> 外文期刊>ISIJ international >Numerical Simulation of Microstructure Evolution During Alloy Solidification by Using Cellular Automaton Method
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Numerical Simulation of Microstructure Evolution During Alloy Solidification by Using Cellular Automaton Method

机译：基于元胞自动机的合金凝固过程中微观组织演变的数值模拟

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摘要

This paper presents two and three dimensional cellular automaton (CA) based models and derived coupling models to simulate micro-scale microstructure evolution during alloy solidification. The models adopt a local solutal equilibrium approach to calculate the kinetics of the solid/liquid (SL) interface evolution, which allows the reasonable calculation of crystal growth from the initial unstable stage to the steady-state stage without the need of a kinetic parameter. Dendrite morphologies with various crystallographic orientations and well developed side branches in two and three dimensions can be successfully simulated by the proposed models. In conjunction with the lattice Boltzmann method (LBM), adopted for numerically solving fluid flow and solutal transport, a coupling model was derived to simulate the solutal dendrite growth in the presence of melt convection. The 2D model was extended to the multiphase system for the simulation of divorced eutectic solidification of spheroidal graphite (SG) cast iron. The quantitative capabilities of the models are addressed by comparing simulations to analytical predictions and experimental data.
机译：本文介绍了基于二维和三维元胞自动机（CA）的模型以及导出的耦合模型，以模拟合金凝固过程中微观组织的演变。这些模型采用局部溶液平衡方法来计算固/液（SL）界面演化的动力学，从而无需动力学参数即可合理地计算从初始不稳定阶段到稳态阶段的晶体生长。所提出的模型可以成功地模拟具有各种晶体学取向以及在二维和三维方向上发达的侧枝的枝晶形态。结合采用格子Boltzmann方法（LBM）数值求解流体流动和溶质运移，导出了耦合模型，以模拟在存在熔体对流的情况下溶质枝晶的生长。将二维模型扩展到多相系统，以模拟球墨铸铁的离析共晶凝固。通过将模拟与分析预测和实验数据进行比较，可以解决模型的定量功能。

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  • 来源
    《ISIJ international》 |2010年第12期|p.1851-1858|共8页
  • 作者

    Mingfang ZHU; Shiyan PAN; Dongke SUN; Honglei ZHAO;

  • 作者单位

    Jiangsu Key Laboratory for Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189 China;

    Jiangsu Key Laboratory for Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189 China;

    Jiangsu Key Laboratory for Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189 China;

    Jiangsu Key Laboratory for Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    solidification; microstructure simulation; cellular automaton; lattice boltzmann method;

    机译：凝固;微观结构模拟细胞自动机格子布兹曼方法;

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