About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
In-Situ Femtosecond Micromachining in Laser Powder Bed Fusion Processes |
Author(s) |
Gonzalo Reyes, Justin Krantz, Cody Lough, Ben Brown, Brian Moorhead, Edward Kinzel, Robert Landers |
On-Site Speaker (Planned) |
Gonzalo Reyes |
Abstract Scope |
Laser Powder Bed Fusion (LPBF) offers flexibility in fabricating complex components; however, its ability to produce high-resolution features is limited by the laser spot size and melting process. These limitations necessitate post-processing, which has significant registration challenges when aligning the part in the post fabrication system with the new tooling. In this work, we conduct experimental studies on an LPBF system that incorporates a fiber laser for processing and a femtosecond laser for in-situ micromachining. Process maps for micromachined slits, assisted by continuous wave laser irradiation on 3D-printed parts, are generated. These maps describe the effects of pulsed energy, pulse overlap, scan repetition, and continuous wave laser power on track width, form factor, and material removal rate. This mapping provides for the opportunity to optimize material removal and machined feature geometry. This work is a crucial step toward developing an efficient layer-by-layer micromachining strategy for parts with high-aspect ratio micro-features. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |