| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Investigating the Influence of Part Geometry on the Fatigue Resistance of SLM Thin-Wall Inconel 718 |
| Author(s) |
Connor Varney , Paul F. Rottmann |
| On-Site Speaker (Planned) |
Connor Varney |
| Abstract Scope |
For near-net-shape additively manufactured (AM) to be deployed in structural applications, a robust understanding of the fatigue resistance exhibited by near-surface regions and part locations with a high degree of geometrical complexity (e.g. thin walls) is essential. This is challenging, as local cooling rates are highly dependent on microstructure due to the low thermal conductivity of uncoalesced powder. Previous results have shown that for Inconel 718 (IN718) this manifests in significant differences in intergranular microstructure, grain size, and grain morphology while holding print strategy constant for thin-wall and bulk regions. In this study, the influence of this microstructural heterogeneity on fatigue resistance will be systematically quantified by conducting low cycle fatigue testing on IN718 thin-wall and bulk specimens both perpendicular and parallel to the build direction with rotated and aligned scanning. Fatigue life and crack growth rates will be calculated in parallel with microstructural characterization (EBSD, MicroCT) to interpret results. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |