About this Abstract |
| Meeting |
2026 AWS Professional Program
|
| Symposium
|
2026 AWS Professional Program
|
| Presentation Title |
Weldability and Precipitate Evolution of GRCop42 |
| Author(s) |
Joe Kleindienst, Jonah Klemm-Toole |
| On-Site Speaker (Planned) |
Joe Kleindienst |
| Abstract Scope |
GRCop42 is a Cu-Cr-Nb alloy important to the aerospace industry due to its combination of high thermal conductivity and high temperature strength. The production of GRCop42 has been limited to powder-based additive manufacturing (AM) and powder metallurgy techniques due to the high cooling rates required to produce small Cr2Nb precipitates and the lack of wire feedstock availability. Wire based directed energy deposition (DED) production of GRCop42 would greatly increase the possible deposition rates, build volumes, and joining applications in aerospace production. In this study, wire GRCop42 feedstock has been used to make DED builds through three processes: laser wire DED, gas metal arc DED (GMA-DED), and electron beam DED (EB-DED). The solidification morphology and length scale of the Cr2Nb precipitates has been studied and the hardness of the builds has been compared. Additionally, the effect of EB remelts of increasing heat input on the size of Cr2Nb precipitates and hardness of the fusion zone has been measured as well as modeled. The results of this work are expected to provide an understanding of how Cr2Nb precipitates behave in GRCop42 processed with various fusion based deposition methods and streamline process selection and parameter development of wire-based AM production of GRCop42. |
| Proceedings Inclusion? |
Undecided |