|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Beyond the Beam III
||Atomistic and Mesoscale Modeling of Sintering Kinetics in Solid-state Additive Manufacturing
||Fadi Abdeljawad, Omar Hussein
|On-Site Speaker (Planned)
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.
||Additive Manufacturing, Computational Materials Science & Engineering, Powder Materials