About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
The Effect of Thermoelectric Magnetohydrodynamics on Microstructure Evolution in Additive Manufacturing |
Author(s) |
Andrew Kao, Xianqiang Fan, Catherine Tonry, Peter Soar, Peter David Lee, Koulis Pericleous |
On-Site Speaker (Planned) |
Andrew Kao |
Abstract Scope |
Melt pools formed in laser additive manufacturing (AM) are subject to large thermal gradients, resulting in the formation of thermoelectric currents. These currents interact with magnetic fields generating a Lorentz force which drives fluid flow. This phenomenon, known as Thermoelectric Magnetohydrodynamics (TEMHD) significantly impacts the melt pool morphology and microstructural evolution. TESA (ThermoElectric Solidification Algorithm) is a bespoke, parallel multi-scale code that solves rapid microstructure solidification with fluid flow and thermoelectric currents, capable of capturing the fully coupled process over multiple layers. The system is highly dependent on the orientation and strength of the magnetic field with competition between Marangoni flow and TEMHD resulting in control of the depth, width and potential deflections of the melt pool. This leads to significant changes in the microstructure including modification to the melt pool boundary layer and epitaxial growth. The numerical predictions compare favourably to Xray synchrotron experiments. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Solidification |