About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
A Phase-field Study of Microstructure Development in a Melt Pool during Additive Manufacturing |
Author(s) |
Yijia Gu, Xiaoming He |
On-Site Speaker (Planned) |
Yijia Gu |
Abstract Scope |
A phase-field model incorporated with the coupled thermal-solutal diffusion and solute trapping was developed for the rapid solidification of dilute alloys. Using the developed phase-field model, the solidification of a melt pool during additive manufacturing (AM) process was investigated. The predicted temperature evolution, as well as the solute concentration evolution at both sides of the solid-liquid interface depict a complex solidification process. The simulation predicted three distinct stages of the solidification of the melt pool, i.e. initial transient, steady state, and final transient. The predicted velocity of the interface during steady state agreed well with experimental observations. In addition, the solidification structures including the width of the coarse band and spacing of the cell structure predicted from the phase-field simulation agrees well with experimental observations quantitatively. In summary, the developed phase-field model shows the potential to unveil the mechanism of microstructures development during rapid solidifications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Modeling and Simulation |