Ti-Cu-W体系Pillow飞片加载铋熔化再凝固过程计算分析

Calculation Analysis of the Impact Melting and Resolidification Process for the Bismuth Using the Ti-Cu-W Pillow Flyer

采用数值计算设计了Ti-Cu-W材料体系Pillow飞片,实现金属铋样品的冲击加载和准等熵加载,并通过实验研究铋的冲击熔化再凝固这一复杂的物理过程,实验获得的速度波剖面结果与数值模拟结果基本一致。还建立了金属铋的包含5个固相和1个液相的完全物态方程,计算相图的三相点以及高压区的Hugoniot线与实验数据吻合较好,计算还获得了冲击加载再凝固实验中的温度信息和相变信息。通过计算分析和对实验数据的解读,认为Ti-Cu-W材料体系Pillow飞片加载可以用于铋的冲击熔化再凝固复杂物理过程研究,为实验探索研究建立了适用的研究方法和有效的技术手段。

Numerical simulations are carried out to design the Pillow flyer of Ti-Cu-W system,and the impact loading and quasi-isentropic loading of the bismuth sample are also carried out.We experimentally investigate the intricate physical process of impact melting and resolidification.Experiment results of wave profiles are similar with numerical ones.The complete equation of state of bismuth including five solid phases and one liquid phase is established.Triple points in phase diagram and the Hugoniot curve in high pressure area agree well with the experiment data.The temperature and phase transition information in impact loading and resolidification experiment are also obtained.According to the calculation analysis and interpretation of the experiment data,the loading experiment based on Ti-Cu-W flyer is available to study the physical process of impact melting and resolidification of bismuth,and an appropriate research method and effective technique means for experiment exploration is established.