| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Critical Defects in Laser Powder Bed Fusion- Surface, Sub-Surface, Geometric and Microstructure Effects |
| Author(s) |
Joy Gockel |
| On-Site Speaker (Planned) |
Joy Gockel |
| Abstract Scope |
Metal additive manufacturing (AM) is known to generate various types of process induced flaws. However, whether to classify these flaws as “critical defects” is currently uncertain. Inherent flaw types such as surface notches and porosity are investigated, including post-processing surface treatments to reduce and remove the surface roughness. Anomalous processing conditions to induce spatter and a witness line generate sub-surface porosity and geometric deviations. Post-processing heat treatment is used to determine the influence of microstructure on the effect of defects. A stress intensity-based approach relates different types of flaws in a unified framework to determine critical dimensions of the various flaw categories leading to failure. The suitability of this approach to capture the effect of different flaw types and extendibility across materials will be discussed. Understanding the influences of microstructure and flaws on fatigue behavior can provide guidance for post-processing requirements and necessary design guidelines around critical defects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Process Technology |