About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
The Influence of Surface Finish and Build Orientation on the Low Cycle Fatigue Behaviour of Laser Powder Bed Fused Stainless Steel 316L |
Author(s) |
Robert Lancaster, William Beard, Thomas Jones, Nicholas Barnard |
On-Site Speaker (Planned) |
Robert Lancaster |
Abstract Scope |
Additive manufacturing (AM) is under consideration for marine based components due to the numerous benefits the techniques offer. However, there are multiple challenges associated with the introduction of AM-parts into safety critical applications related to their mechanical behaviour. One of the main factors influencing a component’s cyclic performance is the surface finish. As-built AM-parts exhibit a high surface roughness, owing to the layer-by-layer nature of the AM-process and the presence of partially-bonded powder particles and sharp rooted surface features that can vary in severity, promoting surface-breaking stress-raising sites. This behaviour is further influenced by the build orientation of the component, with alternative orientations providing a different surface profile due to the nature of scaffolding, alongside a contrasting microstructural morphology. This research will explore the LCF behaviour of LPBF stainless-steel 316L built in different build orientations and subjected to several post-manufacture finishing procedures to identify the optimal condition for mechanical performance. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |