| 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 |
Effect of Surface State and Material on Surface Quality Enhancement by Dual Laser Powder Bed Fusion |
| Author(s) |
Daniel Ordnung, Jitka Metelkova, Brecht Van Hooreweder |
| On-Site Speaker (Planned) |
Daniel Ordnung |
| Abstract Scope |
Parts produced by Laser Powder Bed Fusion typically exhibit a limited surface quality often requiring systematic post-processing. The KU Leuven AM team recently developed a Dual Laser Powder Bed Fusion strategy to improve the quality of inclined up-facing surfaces during building. It consists of two steps: (1) a pulsed laser induces shock waves to remove powder from inclined surfaces, followed by (2) in-situ laser remelting of the newly exposed surfaces. The first part of this paper covers the effect of the used material and initial surface state on the powder removal efficiency using shock waves. A design of experiments was performed for horizontal samples of tool steels, titanium and aluminium alloys. The second part deals with the powder removal efficiency for inclined surfaces of variable initial surface state (Ra<20µm, Ra>30µm). Finally, the third part demonstrates the surface quality improvement, resulting in a reduction of Ra by 48% for 15° inclinations. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |