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 |
Effects of Scan Strategy Induced Microstructural Differences on Thin-Wall SLM IN718 Fatigue Performance |
Author(s) |
Connor Varney , Imran Noor, Paul Rottmann |
On-Site Speaker (Planned) |
Connor Varney |
Abstract Scope |
As-printed microstructures of additively manufactured parts is a function of many variables spanning from scan strategy to part geometry. Elucidation of the complex relationship between geometry, scan strategy, and resultant microstructure is necessary to enable the widespread adoption of AM parts in life-limiting and load bearing applications. In this study a series of IN718 compact tension fatigue samples were printed via SLM using a contour/hatching based scan strategy with both rotated and aligned beam directions, with half having the crack oriented vertically, and half horizontally. Half of each sample type were printed with an internal (~0.5mm) pore to simulate the effects of porosity near the contour/hatching boundary. These samples were tested in LCF, and the tests were monitored through digital image correlation to identify the initiation and propagation of fatigue cracks. After combining with EBSD datasets this will allow for a greater understanding of the processing-properties-performance relationship of AM IN718. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, High-Temperature Materials |