About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Field-Assisted Material Processing and Solidification
|
| Presentation Title |
Combining X-ray Radiography and Numerical Modelling to Capture Marangoni Versus Thermoelectric Forces upon Additive Manufacturing Melt Pool Dynamics |
| Author(s) |
Ivars Krastins, Harry E. Chapman, Xianqiang Fan, Catherine Tonry, Matthaios Alexandrakis, Peter Soar, Sebastian Marussi, Koulis Pericleous, Peter D. Lee, Andrew Kao |
| On-Site Speaker (Planned) |
Ivars Krastins |
| Abstract Scope |
In laser additive manufacturing, the process conditions together with material properties govern the final print quality of the build. Marangoni and Thermoelectric forces both drive flow and temperature in the melt pool, controlling microstructure. However, for both forces many of the thermophysical properties (e.g., surface tension, Seebeck coefficient) are poorly characterised, if at all. Here we combine in situ synchrotron X-ray radiography and numerical modelling to investigate melt pool dynamics in the case of Marangoni flow and thermoelectric magnetohydrodynamic flow when a magnetic field is applied. By comparing numerical simulations to experimental observations and using the relevant physics, we can perform a parametric analysis to determine the previously unknown boundary conditions and thermophysical properties. This has the added benefit of clearly identifying the dominant physics under different conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Other |