About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
Effect of a Build Stop on the Fatigue Behavior of Laser Powder Bed Fusion 316L Stainless Steel with As-printed Surfaces |
Author(s) |
Simon Richardsen, Jorge Ramirez Lujan, Charles Smith, Garrison Hommer, Jonah Klemm-Toole, Joy Gockel |
On-Site Speaker (Planned) |
Joy Gockel |
Abstract Scope |
Build stops can occur during metal additive manufacturing (AM) with laser power bed fusion (PBF-LB) for a variety of reasons such as power outage, insufficient gas flow, or sensor failure. It is economically desirable to continue a build after the issue is resolved. However, the effect on part quality, such as microstructure, porosity, surface roughness and geometric features is not well understood. This study considers parts fabricated with a 2-hour build stop. Quantitative comparisons of the dimensions, as-printed surface features, microstructure, porosity, and fatigue performance are determined. Based on comparison to prior work, build stop effects are highly dependent on the geometry and part layout on the build platform. Geometric deviation from part shift during the build stop location is significant, however other anomalies inherent to AM can still dominate failure. Understanding the effect of material changes from a build stop can help reduce scrap from unintended build interruptions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, |