| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
F-51: Prediction of Build Geometry to Prevent Lack of Fusion and Bead Stacking in Arc Wire Directed Deposition (AW-DED) |
| Author(s) |
Sophia E. Hill, Jonah Klemm-Toole |
| On-Site Speaker (Planned) |
Sophia E. Hill |
| Abstract Scope |
Arc wire directed energy deposition (AW-DED) has many attractive features for the manufacturing of large components such as high deposition rates and lower cost wire consumables compared to powder bed processes. AW-DED builds can exhibit similar defects to powder bed processes, such as lack of fusion porosity, resulting from the insufficient overlap of melt tracks or beads. However, additional defects unique to DED processes, such as bead stacking from too closely spaced beads causes progressive skew and instability in builds. In this work, experiments were conducted to evaluate the effects of AW-DED process parameters, metal transfer modes, shielding gas type, and heat source travel strategies on the occurrence of defects. Based on these experiments, easy-to-use analytical models have been developed to predict lack of fusion and bead stacking, accounting for the various processing conditions in AW-DED. The application of these new models to help guide AW-DED process development is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Solidification |