| About this Abstract |
| Meeting |
2018 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Design and Simulation of Materials (CDSM 2018): Computational Design of Materials
|
| Presentation Title |
Study on the Effect of Applied Pressure on Directional Dendritic Growth by In-situ Observation |
| Author(s) |
Shan Shang, Keyan Wu, Leewei Kuo, Zhiqiang Han |
| On-Site Speaker (Planned) |
Zhiqiang Han |
| Abstract Scope |
The dendritic growth of model material succinonitrile under pressure was studied by in-situ observation and phase filed modeling. A special experimental setup was built, where the pressure applied onto the liquid succinonitrile can be modulated by using a computer controlled apparatus and in-situ observation can be conducted by using a high speed microscope. The experimental results showed that a constant pressure applied increases the dendrite growth velocity while decreases the primary and secondary dendrite arm spacing. When a kind of continuous increase-keep-decrease pressure was applied, it was observed that the dendrite grows with increased pressure and was remelted with decreased pressure. The phase field modeling, where the effect of pressure on Gibbs free energy and interfacial energy was taken into account, presented simulation results coincided with the observation and revealed the mechanism governing the dendritic growth under pressure. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |