| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Modeling of Laser Stirring Scan Strategy in LPBF for High-Throughput Applications |
| Author(s) |
Elizabeth Chang-Davidson, Todd Spurgeon, Ajay Krishnan, Sinan Muftu |
| On-Site Speaker (Planned) |
Elizabeth Chang-Davidson |
| Abstract Scope |
In laser powder bed fusion (LPBF), the most commonly used scan strategies rely on raster- and contour-based patterns, over a whole part or subdivisions of the part. In this work, we investigated a unique circular scanning pattern, termed “laser stirring,” for the purpose of producing significantly larger than usual melt pools and thus increasing build rates. Experimental data was used to calibrate a semi-analytical model, due to the need for fast-running simulations in systematically exploring the high-dimensional process space of this strategy. Based on the experimental data, balling, keyholing, and lack of fusion (non-continuous melt pools) were identified as the flaw regions of interest when process mapping this scan strategy, and semi-analytical modeling was used to predict flaw regions across process space. This laser stirring scan strategy shows promise for going beyond the current boundaries of processing space in LPBF and opening up more potential casting-replacement industry applications of AM. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |