About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
The Impact of as-built Surface Roughness on Vibration Bending Fatigue of Additively Manufactured Nickel Alloy 718 |
Author(s) |
Rachel Tullis, Joy Gockel, Nathan Klingbeil, Luke Sheridan, Onome Scott-Emuakpor |
On-Site Speaker (Planned) |
Rachel Tullis |
Abstract Scope |
Surface roughness has been shown in literature to be a dominating factor in the fatigue life of structural components. This is especially true in additive manufacturing, where as-built surfaces are significantly rough. The impact of surface roughness on fatigue life is still not fully understood in as-built additively manufactured parts, and thus must be studied more extensively. Using a novel vibration bending fatigue testing method, this work has investigated the effects of surface roughness on fatigue life in as-built additively manufactured nickel superalloy 718 fabricated using different additive manufacturing processing conditions. Additionally, fracture surface analysis has been performed to determine the location of crack initiation for each test, highlighting geometrical effects in fatigue testing. The outcome of this work is an enhanced understanding of the surface roughness impact in additively manufactured parts, which is necessary in increasing the efficiency and reliability of additive manufacturing for applications involving fatigue loading conditions. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |