| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling and Simulation: Microstructure, Mechanics, and Process
|
| Presentation Title |
Spattering and Associated Pore Formation Modeling for Laser Powder Bed Fusion of Inconel 718 |
| Author(s) |
Qian Chen, chaitanya Vallabh, Albert To, Xiayun Zhao |
| On-Site Speaker (Planned) |
Qian Chen |
| Abstract Scope |
Laser powder bed fusion (L-PBF) is an important additive manufacturing technology which allows the direct fabrication of metal parts with intricate internal structure in a layer-by-layer manner. Despite the wide industrial applications, L-PBF process still suffers a variety of issues in the fabricated part quality of which defect related to porosity is one of the issues not well studied and tackled. In this study, a spattering simulation model based on discrete element method (DEM) is unidirectionally coupled with single-track laser welding simulation to study the particle spattering driven by vapor flow. This DEM spattering model is calibrated by in-situ monitoring video through the directions and velocity of spattering particles. The landing process of mass particles the velocity of which is from DEM spattering model, is coupled with laser welding simulation to simulate the pore formation due to spattering particles landing on powder bed or entering in unsolidified melt pool. |