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Numerical Simulation of Peritectic Reaction Using a Multi-phase-field Model

机译:用多相场模型进行包晶反应的数值模拟

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A multi-phase-field model is applied to simulate the peritectic reaction of Fe-C alloys. The phase-field equations, the diffusion equation for the multi-phase-field model and a dilute solution approximation for the descriptions of the free energy densities are presented. The thin-interface limit of the phase-field model for alloy solidification is employed to obtain the parameters relationship. The calculated results of the peritectic reactions show that the growth rates of the γ phase follow the parabolic growth kinetics in 1-D isothermal transformations and the linear growth kinetics in the 1-D continuous cooling case. During the 2-D peritectic reaction, where liquid δ and γ phase are in mutual contact, the moving directions of interface are in accord with the driving force of the phase transformation at the interfaces.
机译:应用多相场模型来模拟Fe-C合金的包晶反应。给出了相场方程,用于多相场模型的扩散方程以及用于描述自由能密度的稀溶液近似。利用合金凝固相场模型的薄界面极限来获得参数关系。包晶反应的计算结果表明,γ相的生长速率遵循一维等温转变中的抛物线生长动力学和一维连续冷却情况下的线性生长动力学。在二维包晶反应中,液相δ和γ相相互接触,界面的运动方向与界面处相变的驱动力一致。

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