| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solidification in External Fields
|
| Presentation Title |
Manipulating Flow during Solidification Using Magnetic Fields |
| Author(s) |
Xianqiang Fan, Natalia Shevchenko, Catherine Tonry, Samuel J. Clark, Robert Atwood, Sven Eckert, Koulis Pericleous, Andrew Kao, Peter D. Lee |
| On-Site Speaker (Planned) |
Xianqiang Fan |
| Abstract Scope |
Melt flow is critical to microstructural evolution during various solidification processes, whether in directional solidification, or additive manufacturing. Applying an external magnetic field interacts with the intrinsic thermoelectric currents during solidification, generating a new flow field, due to thermoelectric magnetohydrodynamics (TEMHD). The introduction of TEMHD flow can disrupt the existing buoyancy-dominated flow and potentially tailor the microstructure. However, the physical mechanisms remain unclear, hindering its further application. Here with a focus on directional solidification, using in situ synchrotron X-ray imaging coupled with numerical simulation, we demonstrated that the macroscopic TEMHD flow ahead of the solidification front, along with the interstitial TEMHD flow arising within the mushy zone are the primary mechanisms controlling melt flow, hence microstructure development. Two thermoelectric regimes were revealed, each with distinctive mechanisms that control flow. Further, we demonstrated how the TEMHD effect can also manipulate melt flow in a rapid solidification process, i.e., additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Characterization, Modeling and Simulation |