About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Micro-addition of Fe in Highly Alloyed Cu-Ti Alloys to Improve Both Formability and Strength |
| Author(s) |
Baptiste Rouxel |
| On-Site Speaker (Planned) |
Baptiste Rouxel |
| Abstract Scope |
Cu-Be alloys provide excellent electrical and mechanical properties, but it is progressively forbidden because of their high toxicity. The alternative alloys Cu-Ti have high mechanical resistance but show relatively low formability. This study showed that micro-additions of Fe can allow keeping a high concentration of Ti in solid solution and suppress the classical “wave-like” early-stage precipitation. Instead, a new dispersion of nano precipitates was observed. This behavior allows doubling the ductility in the solution annealed temper, together with maintaining a high strength after aging from precipitation of metastable nano α-Cu4Ti. A Cu-6Ti-0.3Fe alloy had an elongation of 48% at the solution annealed state and, after aging, had a very high yield strength of 975 MPa. This study shows that Fe micro-additions, when combined with higher amounts of Ti (6 wt%), enable the production of Cu-based alloys combining high formability and strength, providing an excellent alternative to Cu-Be in mechanical applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Phase Transformations, Mechanical Properties |