About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Beyond the Beam III
|
Presentation Title |
Atomistic and Mesoscale Modeling of Sintering Kinetics in Solid-state Additive Manufacturing |
Author(s) |
Fadi Abdeljawad, Omar Hussein |
On-Site Speaker (Planned) |
Fadi Abdeljawad |
Abstract Scope |
Recently, several solid-state additive manufacturing (AM) techniques have demonstrated the ability to fabricate 3D objects with complex geometries. While such AM techniques differ in their operating principles, sintering of powder compacts is a key aspect of the AM process. Herein, atomistic simulations are used to examine at a fundamental level the role of grain boundary (GB) anisotropy in sintering behavior and densification rates. Simulation results reveal a plethora of densification profiles as a function of GB character. Then, we present a mesoscale phase field model of solid-state sintering that is capable of capturing interface thermodynamics and accounting for various mass transport mechanisms. The computational model is used to examine the role of particle size/distribution, interface properties, and mass transport mechanisms in sintering rates. Several statistical and topological metrics are employed to quantify the microstructural evolution and densification rates. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Powder Materials |