About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Large-Area EBSD Analysis of Laser Hot-Wire DED Additive Manufacturing |
| Author(s) |
Simon Mason, David Rowenhorst |
| On-Site Speaker (Planned) |
Simon Mason |
| Abstract Scope |
Laser hot-wire directed energy deposition (DED) is an additive manufacturing technique that allows for rapid manufacturing of large-scale components on the order of meters, as opposed to centimeters from more common powder-bed fusion AM techniques. Traditional microscopy and quantitative analysis techniques, such as electron backscatter diffraction (EBSD), are often focused on capturing micron-scale features but must be adapted to explore the larger length-scale features present in DED-manufactured components. This work examines 718 nickel-based superalloy samples manufactured using DED as part of an AM Bench 2025 challenge problem, with grains ranging from microns to centimeters along the build direction. Novel procedures for large-area montages and subsequent data stitching were developed to allow for accurate mapping of grain structures beyond those that can be captured in individual or small sets of scans. Resulting grain size distribution analysis can be used to validate model accuracy for challenge problem submissions. |