|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
||The Role of As-built Surface Morphology in High Cycle Fatigue Failure of IN718
||Orion L. Kafka, Jake Benzing, Nikolas Hrabe, Newell Moser, Donald Godfrey, Philipp Schumacher, Chad Beamer
|On-Site Speaker (Planned)
||Orion L. Kafka
Metal additive manufacturing (AM) is known to produce material with relatively rough surface finish in the as-built condition. It is important to understand the impact such surfaces have upon mechanical performance, especially fatigue performance, because many desired applications for AM involve convoluted shapes with included surfaces that are difficult to post-process. Using X-ray computed tomography, this study explores the roles of complex three-dimensional surfaces within the context of fatigue. Specifically, IN718 samples were built via laser powder bed fusion using a range of different processing parameters, thereby driving different surface roughness characteristics and fatigue behavior.
Geometric and microstructural features most conducive to failure were isolated using a combination of experimental and computational techniques, with particular emphasis towards failures driven by surface conditions. The goal of the research is to provide guidance to machinists and manufacturers towards maximizing fatigue life in the presences of adverse, as-built conditions.
||Additive Manufacturing, Mechanical Properties, Characterization