About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
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Presentation Title |
Effect of Thickness on Ultrasonic Fatigue Behavior of 316L Stainless Steel Made by Powder Bed Fusion Additive Manufacturing |
Author(s) |
Megan Louise Trombley, Qianying Shi, John Edward Allison |
On-Site Speaker (Planned) |
Megan Louise Trombley |
Abstract Scope |
In additive manufacturing (AM) of metallic materials, porosity is an inherent feature which can result in critical defects that impact fatigue behavior. This study explores the effect of AM sample thickness (diameter) on the ultrasonic fatigue behavior of 316L stainless steel. Cylindrical dog-bone specimens of 1.5mm, 2.5mm, and 5.0mm gauge were manufactured by Naval Research Laboratory using a Concept Laser M2 AM machine. The use of ultrasonic fatigue allows for the gathering of larger datasets than feasible using a traditional fatigue testing apparatus. These large datasets enable improvements in statistical treatments in determination of manufacturing process effects such as thickness on fatigue performance of these AM samples. This presentation will review findings on the influence of sample thickness on fatigue behavior including fatigue strength and nature and size of defects present at the site of fatigue crack initiation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Iron and Steel |