|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Design and Simulation of Materials (CDSM 2018): Meso/Macroscale Simulations
||Sintering Dynamics in Direct Write Additive Manufacturing Processes: A Phase Field Model
||Fadi Abdeljawad, Dan Bolintineanu, Adam Cook, Harlan Brown-Shaklee, Daniel Kammler
|On-Site Speaker (Planned)
Direct write additive manufacturing (AM) has emerged as a powerful technology for building objects by adding material layer-upon-layer. Based on a diffuse interface model, we examine solid-state sintering in direct write AM processes. The framework is capable of accounting for bulk thermodynamics, free energies of grain boundaries (GBs) and free surfaces, and capturing various mass transport mechanisms. Simulation results of simple particle geometries recover dynamical scaling laws of pore shrinkage kinetics. Quantitative analysis of the roles of particle size/distribution, equilibrium dihedral angles and interfacial anisotropy on the microstructural evolution is presented. With the aid of several statistical measures, the evolution of the pore space and densification rates are quantified in order to establish a microstructure/morphology map in terms of the model parameters. In broader terms, the proposed modeling framework provides an avenue to explore sintering kinetics of materials processed via direct write AM.
||Planned: Supplemental Proceedings volume