Al-In难混溶合金的液相分离过程及显微组织数值模拟

建立了一个描述Al In难混溶合金冷却过程中液—液相变区微观组织演化过程的数学模型。该模型综合考虑了第二相液滴的形核、扩散长大、Brownian碰撞和运动碰撞的共同作用 ,并对模拟的结果进行了可视化动态模拟研究。以Al 3 0 %In合金为例进行模拟 ,结果表明 ,第二相在断面上的体积分数、粒子大小及分布与实验结果基本一致。这说明建立的模型对Al In难混溶合金具有一定实际预测功能。

Liquid-liquid Phase Separation Process and Numerical Simulation of Microstructure of Al-In Immiscible Alloys

A numerical model has been developed to describe microstructure evolution of Al In immiscible alloys through the miscibility gap. The model considersthe common action of nucleation, diffused growth, Brownian collision and motion collision between the second phase droplets. The simulation results are visualized in dynamic process and show that the volume fraction, distribution and size of the second phase droplets agree with the experimental results satisfactorily. So the model can be used to predict the microstructure evolution of Al In immiscible alloys in the cooling process.