| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spatially Tailored Materials: Processing-Structure-Properties
|
| Presentation Title |
Impact of heat treatments on the microstructure and mechanical properties of γ/γ' Ni-based superalloys produced by DED processes |
| Author(s) |
Guillaume Burlot, Abel Rapetti, Jonathan Cormier, Alice Cervellon, Sophie Gillet |
| On-Site Speaker (Planned) |
Guillaume Burlot |
| Abstract Scope |
The development of direct energy deposition (DED) additive manufacturing processes offers considerable prospects in the field of polycrystalline γ/γ' Ni-based superalloys. Indeed, these processes can be used to build complex-shaped parts and functionally graded materials, as well as to add functionality or to repair existing components. However, the microstructures resulting from the deposition process are highly dependent on the type of DED process used. The chemical segregation induced by dendritic solidification has a direct impact on the initial microstructure, which consequently affects the thermal stability and the kinetics of γ' precipitates evolution during heat treatments. Three distinct DED processes (WAAM-CMT, LMD-p, GTAW) were subjected to investigation. The microstructures at the initial state and after different heat treatments were characterized using SEM, EDS-X, micro-hardness tests and tensile tests. These analyzes revealed notable differences between the processes, particularly regarding the evolution of chemical segregation and of γ' precipitates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, High-Temperature Materials |