About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Behavior of Coated Particles in Directed Energy Deposition |
Author(s) |
Sen Jiang, Baolong Zheng, David Svetlizky, Yizhang Zhou, Lorenzo Valdevit, Noam Eliaz, Enrique J. Lavernia, Julie M. Schoenung |
On-Site Speaker (Planned) |
Baolong Zheng |
Abstract Scope |
ZnAl powder particles, encapsulated with metal coatings to prevent dissolution, can be introduced into aluminum alloys to form self-healing materials. However, in directed energy deposition (DED), the vaporization of Zn during the deposition process presents a challenge for retaining the integrity of the coated ZnAl particles in the final builds, due to the low boiling temperature of Zn. In this work, a COMSOL numerical simulation model was constructed to study the heat transfer and phase transformation for a coated particle floating in the aluminum alloy molten pool. Transient temperatures and phase fields were calculated, and particle residence times, defined as the time required for initiation of Zn vaporization, were determined for different coating thicknesses, molten pool temperatures, particle diameters and coating materials. The calculation results were used to determine the DED process windows for retaining the coated ZnAl particles in the final builds. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Composites, Modeling and Simulation |