About this Abstract |
| Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
| Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
| Presentation Title |
Slit Accuracy of Thin Walls in Laser Powder Bed Fusion |
| Author(s) |
Brian Johnstone, Christopher Saldana, Kyle Saleeby |
| On-Site Speaker (Planned) |
Brian Johnstone |
| Abstract Scope |
Accurate fabrication of detailed features is a critical roadblock for adoption of certified metal additive manufacturing components. However, as features decrease in size, their dimensional accuracy becomes more sensitive to variation in processing conditions including heat input and contact with the recoater blade. In this paper, slitted thin walls were manufactured with varying thicknesses, slit aspect ratios, and laser powers. Error in dimensional accuracy of slits was measured via X-ray computed tomography, stemming from dross formation on overhanging horizontal edges and deflection recoater blade contact on vertical edges. Experimental results indicate slits were more likely to have lower dimensional accuracy on their longer side, while increasing laser power decreased deflection of the vertical edges but increased dross formation on the horizontal edges. Each type of defect was more prominent in thinner walls. Understanding the balance of these conditions will allow greater use of precise geometries for various applications. |
| Proceedings Inclusion? |
Planned: Post-meeting proceedings |