摘要
Isothermal solidification process of a dissimilar transient liquid phase （TLP） bonding of FSX-414/MBF80/IN738 system was simulated by finite difference method. The TLP joint model was divided into two parts and a moving liquid /solid interface model was used for the parts. Diffusion equations were solved for each half of the joints simultaneously up to the end of isothermal solidification. The completion time of isothermal solidification, concentration profiles and position of the solid/liquid interface for each half were calculated. The intersection of the solid/liquid interfaces of two halves was considered the end of isothermal solidification. To obtain some required diffusion data, TLP bonding of FSX-414/MBF80/IN738 was performed at different temperature and time under vacuum atmosphere. The calculated results show good agreement with the experimental results.
采用有限元差分法模拟FSX-414/MBF80/IN738体系异种瞬时液相(TLP)连接的等温凝固过程。将TLP连接模型分为2部分,并运用一个移动的液/固界面模型来研究他们。使用扩散方程对每部分接头进行预测,直到等温凝固过程结束;分别预测了这2部分的等温凝固完成时间、浓度分布曲线和固/液界面位置,认为这2部分固/液界面的交点是等温凝固的终点。为了获得一些必要的扩散数据,在不同温度、时间和真空条件下进行FSX-414/MBF80/IN738体系的瞬时液相连接实验。结果表明,实验结果与预测结果一致。
