| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
An Evaluation of Interpass Temperature Control in Arc-DED for Distortion Mitigation using Finite Element Thermomechanical Modeling |
| Author(s) |
Matthew A. Register, Daniel Johnson, Ryan Stokes, Matthew W Priddy |
| On-Site Speaker (Planned) |
Matthew A. Register |
| Abstract Scope |
During the Arc-DED process, nonuniform heating and cooling can lead to unwanted residual stresses and distortion in the as-built part. A fixed dwell time is often implemented allowing the part to partially cool before the next layer is deposited; however, heat accumulates in the part leading to varying weld bead sizes and heterogenous properties. Interpass temperature control adjusts the dwell time based on a prescribed minimum temperature prior to printing the next layer. This method improves thermal expansion and the heterogenous microstructure by keeping the thermal history the same for each new layer. The focus of this study will look to evaluate both methods of dwell time implementation using finite element thermomechanical models to determine the optimal interpass temperature and dwell time for maraging 250 steel. Comparisons from the predicted distortion to experimental substrate distortion will be used to determine which method is most useful prior to printing the part. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |