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Numerical simulation of microstructure and solutal microsegregation formation of ternary alloys during solidification process

机译:三元合金凝固过程中微观结构和溶质微观偏析形成的数值模拟

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摘要

A model of microstructure and microsegregation of ternary alloys is presented using a cellular automaton (CA) method. In the model the solid fraction is deduced from the relationship between the temperature, solute concentration and curvature of the solid/liquid interface, which can be expressed as a cubic equation instead of assuming the solid/liquid interface position and shape, so as to deduce the solid fraction according to the interface velocity. Then, using the model, a dendrite of Fe-C-Si ternary alloy with 0 and 45° of preferential growth direction are simulated respectively. Finally, a solidification microstructure and solute microsegregation are simulated, and the simulated results can represent the microstructure and different solute segregation during solidification process. Furthermore, the model can be extended to multicomponent alloys solidification process.
机译:使用元胞自动机(CA)方法提出了三元合金的微观结构和微观偏析模型。在该模型中,从温度,固溶体浓度和固/液界面曲率之间的关系推导出固相分数,可以用三次方程表示,而不用假设固/液界面的位置和形状,从而推导出固相分数。固体分数取决于界面速度。然后,使用该模型分别模拟了优先生长方向为0和45°的Fe-C-Si三元合金的枝晶。最后,模拟了凝固组织和溶质的微观偏析,模拟结果可以代表凝固过程中的微观组织和不同的溶质偏析。此外,该模型可以扩展到多组分合金的凝固过程。

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  • 来源
    《Ironmaking & Steelmaking》 |2009年第6期|442-450|共9页
  • 作者单位

    School of Material Science and Engineering, Shenyang University of Technology, Shenyang, 110023, China;

    School of Material Science and Engineering, Shenyang University of Technology, Shenyang, 110023, China;

    State Key laboratory for Fabrication and Processing of Non-ferrous Metals, General Research Institute for Non-ferrous Metals, Beijing, 100088, China;

    State Key laboratory for Fabrication and Processing of Non-ferrous Metals, General Research Institute for Non-ferrous Metals, Beijing, 100088, China;

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