Yang Erxu, Ding Tao, Ren Tingzhi
National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao, Hebei, 066004, China.
Heliyon. 2024 Sep 7;10(18):e37626. doi: 10.1016/j.heliyon.2024.e37626. eCollection 2024 Sep 30.
This study utilized FLUENT dynamic mesh simulation technology to simulate the temperature field distribution characteristics during the continuous casting (CC) process of 5 mm thick ZrTiCuNiBe (Vit1) bulk metallic glass (BMG), analyzed and discussed the amorphous forming ability of the Vit1 BMG plate prepared through CC. The results indicate that during the CC process, the temperature gradient and cooling rate of Vit1 BMG plate decrease with increasing distance from the cooling copper block surface and prolonged solidification time. Even at the lowest cooling rate, it still remains significantly higher than the critical cooling rate ( ) of Vit1 bulk amorphous alloy. The temperature variations recorded by the thermocouple during the alloy melt solidification process are in basic agreement with the simulation data. The experimental test and simulation results show that 5 mm thick Vit1 BMG slab can be prepared theoretically by continuous casting technology. Finally, XRD, DSC and TEM were used to analyze the amorphous formation ability and microstructure of the Vit1 BMG slab.
本研究利用FLUENT动态网格模拟技术，模拟了5mm厚ZrTiCuNiBe（Vit1）块体金属玻璃（BMG）连铸（CC）过程中的温度场分布特征，分析并讨论了通过连铸制备的Vit1 BMG板的非晶形成能力。结果表明，在连铸过程中，Vit1 BMG板的温度梯度和冷却速率随着距冷却铜块表面距离的增加和凝固时间的延长而降低。即使在最低冷却速率下，其仍显著高于Vit1块体非晶合金的临界冷却速率（ ）。合金熔体凝固过程中热电偶记录的温度变化与模拟数据基本一致。实验测试和模拟结果表明，理论上可通过连铸技术制备5mm厚的Vit1 BMG板坯。最后，采用XRD、DSC和TEM分析了Vit1 BMG板坯的非晶形成能力和微观结构。
