About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Physical Modeling
|
Presentation Title |
Laser Spot Size and Scaling Laws for Laser Beam Additive Manufacturing |
Author(s) |
Jordan S. Weaver, Jarred Heigel, Brandon Lane |
On-Site Speaker (Planned) |
Jordan S. Weaver |
Abstract Scope |
Laser powder bed fusion requires the careful selection of laser parameters for each material and machine, which is a laborious process. Scaling laws based on the laser power, speed, and spot size; melt pool geometry; and thermophysical properties can potentially reduce this effort. Laser spot size is one critical parameter that is less well studied. Consequently, single track laser scans were generated with a spot size (D4σ) range of 50 μm to 322 μm and melt pool aspect ratio range from 0.1 to 7.0. These were characterized by in-situ thermography, cross-sectioning, and optical microscopy. Scaling laws from literature which contain a minimum of three dimensionless parameters and account for changing absorption between conduction and keyhole mode provide the most accurate melt pool depth predictions (< 35 % difference from experiments), which is comparable to thermal simulation results from literature for a select number of cases. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |