| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Fabrication of Supportless Lattice Structures Using Burst Mode Drop-on-Demand Liquid Metal Jetting |
| Author(s) |
Paarth Mehta, Usama Rifat, Denis Cormier |
| On-Site Speaker (Planned) |
Paarth Mehta |
| Abstract Scope |
The properties of topology optimized metallic additively manufactured (AM) lattice structures have been extensively studied to date. One challenge with using powder bed or vat AM processes, however, is that lattice structures that are enclosed by solid skin surfaces cannot be produced, as it would be impossible to remove trapped powder or liquid. This talk will present advances in support-free fabrication of engineered lattice structures using drop-on-demand liquid metal jetting (LMJ). This approach enables fabrication of completely enclosed lightweight lattice structures. A burst-mode jetting strategy is introduced in which multiple droplets are ejected at high frequency followed by a brief delay to allow the droplet cluster to partially solidify. By varying the drops/burst, frequency, stepover distance, and pause time, struts can be produced with a range of diameters and inclination angles without supports. Experimental results, including characterization of density, microstructure, and mechanical properties will be presented. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |