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 Sample Thickness, Residual Stress, and Surface Condition on Ultrasonic Fatigue Behavior of LPBF 316L |
Author(s) |
Megan Louise Trombley, John Allison |
On-Site Speaker (Planned) |
Megan Louise Trombley |
Abstract Scope |
We have previously shown that the ultrasonic fatigue response of additive manufacturing samples of 316L steel exhibits a pronounced effect of as-built sample diameter. Laser powder bed fusion (LPBF) specimens built on a Concept Laser M2 have shown an increase in fatigue life and fatigue strength as the diameter of specimens is reduced from 5.0 mm to 2.5 mm and 1.5 mm. The current work investigates the influence of surface condition and residual stress on these results. Axial residual stress depth profiling, stress relief annealing, and varying degree of surface removal and polishing are used to quantify how surface roughness and residual stress impact the sizing effects observed. This work will help inform the ICME framework and design guidelines to better correlate lab testing to component applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Iron and Steel |