About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Effect of Building Parameters on Mechanical Properties and Residual Stresses of LP-DED Inconel 718 Overhanging Structures |
Author(s) |
Angel Fernando Bravo, Kurtis Watanabe, Kevin Wheeler, Vasyl Hafiychuk, Paul Gradl, Colton Katsarelis, Francisco Medina, Edel Arrieta |
On-Site Speaker (Planned) |
Angel Fernando Bravo |
Abstract Scope |
Additive manufacturing of Inconel 718 via laser-powder direct energy deposition (LP-DED) offers design flexibility for repair and fabrication of large components. However, mechanical properties remain sensitive to process parameters such as build angle, which impact the consistency of material properties in the case of a semi-five-axis machine. This study investigates the effect of two different build angles (0° and 35°) at different building powers (1070W and 2000W) on the mechanical properties and residual stresses. Four overhanging structures were fabricated in an RPMI 222 system and subjected to standardized post-processing (SR+HIP+SOL+Aging). Computer simulation models were developed to predict residual stresses in the artifacts. Specimens were machined from the artifacts for tensile (ASTM E8) and high-cycle fatigue (HCF) testing (ASTM E466). The presentation concludes with a comparison and remarks about the repeatability and reproducibility of material properties between build angles and different power approaches. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |