About this Abstract |
| Meeting |
2025 AWS Professional Program
|
| Symposium
|
2025 AWS Professional Program
|
| Presentation Title |
Rationalizing Phase Transformations During Wire-DED of 410 Stainless Steel Using CALPHAD Modeling and In-Situ Thermal Sensing |
| Author(s) |
Rangasayee Kannan, Yousub Lee, Yiyu Wang, Miguel Hoffmann Rodriguez, Mario Rodriguez Parra, Thomas Feldhausen |
| On-Site Speaker (Planned) |
Rangasayee Kannan |
| Abstract Scope |
In this talk, we focus on rationalizing the phase transformations during wire-directed energy deposition (Wire-DED) of 410 stainless steel using CALPHAD modeling and in-situ infrared (IR) thermal sensing. A Wire-DED-specific continuous cooling transformation (CCT) diagram capturing the full transformation sequence—L → δ → γ → α′—will be generated using CALPHAD and experimentally validated via Gleeble dilatometry testing. 410 stainless steel walls will be fabricated using the Wire-DED process. In-situ voxelated IR data will be used to extract thermal cycles, and cooling curve analysis will help identify the extent of martensitic transformation at each voxel. Microstructure predictions from the CCT diagram and IR data will be validated through multi-scale characterization techniques. We will also discuss the implications of local variations in phase fractions on mechanical properties and residual stress development. The validated approach of CALPHAD-based CCT diagram, in conjunction with the in-situ IR analysis, will enable voxel-level rationalization of phase transformations in Wire-DED 410 stainless steel builds. |
| Proceedings Inclusion? |
Undecided |