| About this Abstract |
| Meeting |
Superalloys 2024
|
| Symposium
|
Superalloys 2024
|
| Presentation Title |
Mechanical Properties of Waspaloy Repaired by Laser Metal Deposition and Cold Metal Transfer |
| Author(s) |
Alice Cervellon, Marjolaine Sazerat, Romain Bordas, Lucie Barot, Sophie Gillet, Azdine Nait-Ali, Patrick Villechaise, Roland Fortunier, Jonathan Cormier |
| On-Site Speaker (Planned) |
Alice Cervellon |
| Abstract Scope |
The microstructure and mechanical properties of additively manufactured Waspaloy were characterized in the industrial context of refurbishment. Two processes were studied to discuss their advantages and drawbacks considering the targeted application: Laser Metal Deposition with powder and Cold Metal Transfer. The resultant microstructures were compared in the build-up and at the interface between the wrought base Waspaloy and the additively manufactured part, in the as-built condition and after post weld heat treatments. Tensile and creep properties were studied along three directions - horizontal, vertical and at the interface – to assess the anisotropy of the build-up and the strength of the interface/Heat Affected Zone induced by the metal deposition. Results show that both processes have limited anisotropy in the conditions studied, even though Cold Metal Transfer presents an important crystallographic and microstructural texture. Depending on the process used and heat treatments applied, the interface/Heat Affected Zone may not be the weakest point of the repaired part despite a neat interface. High temperature creep results also suggest that post weld heat treatments may not be necessary if this is the primary design criteria. Tensile properties of Cold Metal Transfer Waspaloy are highly dependent on the deposit thickness from where the specimens are extracted, due to an in-situ heat treatment that takes place during production of large deposits. The different results are discussed considering the limitations of industrial repair operations such as metal costs, deposition rate, repaired volume and targeted application. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |