| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Large-scale Metallic Components
|
| Presentation Title |
A-10: Influence of Exposure Strategy on Part Quality in Multi-Laser-Powder-Bed-Fusion (M-LPBF) |
| Author(s) |
Tino Pfalz, Astrid Rota |
| On-Site Speaker (Planned) |
Tino Pfalz |
| Abstract Scope |
When printing large-scale metallic parts using the LPBF-process, systems with big building envelops are required. Thus, it is favorable to use systems with multiple lasers to increase productivity. Depending on the size of the scan field, it is necessary to split the exposure area and use multiple lasers to expose the respective layers.
To investigate the influence of different exposure strategies on part quality in M-LPBF, porosity and tensile tests were conducted on Ti6Al4V samples, that were built by two lasers using an EOS M400-4. While the mechanical properties only showed minor differences between single- and dual-laser exposure, a significant increase in porosity for the dual-laser samples was observed. By using CT- and optical topography analysis we were able to identify the underlying defect forming mechanism. These findings help to optimize the exposure strategy in such a way that the formation of additional porosity in M-LPBF can be significantly reduced. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Process Technology, |