| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Applications II
|
| Presentation Title |
Active Force Regimes in Powder Spreading |
| Author(s) |
Nicholas Cunningham, Noah Philips, Yifei Ma, T. Matthew Evans |
| On-Site Speaker (Planned) |
Nicholas Cunningham |
| Abstract Scope |
Defect-free powder bed additive manufacturing requires well behaved powder spreading to achieve uniform, thin layers. Rotary drum testing on powder feedstock can quantify the effect of particle size distribution, absolute moisture content, and powder morphology on powder flow, but there is a desire to fundamentally understand how these powder characteristics dictate spreading quality. In this study, a discrete element method (DEM) model captures the cohesive mechanical, electrostatic, and capillary forces present in powder bed systems. Simple experiments with refractory powders are used to calibrate the model, while rotary drum and spreading tests are used for model validation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |