| 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 |
Complex Laser Beam Shaping for Improved Process Control in Metal Additive Manufacturing |
| Author(s) |
Thej Tumkur, John Roehling, Gabe Guss, Kaila Bertsch, Manyalibo J Matthews |
| On-Site Speaker (Planned) |
Thej Tumkur |
| Abstract Scope |
Process instabilities in laser powder bed fusion additive manufacturing (AM), arise from insufficient optothermal control induced by Gaussian beams at the melt pool scale. We incorporate laser beams shaped in amplitude, phase and polarization, to deliver controlled and modulated optothermal profiles on the powder bed. Unique optical properties of such beams (such as non-diffractive propagation and phase singularities) result in an improved combination of reduced spatter, keyholing and porosity, and results in improved tensile properties across a broad scan parameter range, compared to conventional beams. We employ Multiphysics simulations and highspeed imaging for feedback and validation for printing SS 316 and Inconel 625.
Prepared by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-846873 |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |