| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
C-18: Effect of Ti Addition on the X-phase Precipitation in Cu-Al-Ni Shape Memory Alloy Manufactured by Melt Spinning Process |
| Author(s) |
Yejun Park, Pyuck-Pa Choi |
| On-Site Speaker (Planned) |
Yejun Park |
| Abstract Scope |
Cu-Al-Ni shape memory alloy has been limited to applications due to its severe brittleness, despite its low price and high transformation temperature. To overcome the brittleness, the melt spinning process has been tried as one of the methods for gain refinement. In this study, the effect of Ti addition into Cu-Al-Ni alloy on the precipitation of the X-phase was investigated. The microstructural characterization was conducted with transmission electron microscopy (TEM) and atom probe tomography (APT). Only the nanoscale precipitation was observed in melt spun, whereas both microscale and nanoscale precipitation were observed in casting. This difference is considered to come from the supersaturation of Ti during the melt spinning process. As a result of tensile tests and further microstructural analysis, it was observed that the nanoscale precipitation in melt-spun Cu-Al-Ni alloy plays a role in the increase of mechanical properties by pinning the twin interface during deformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, Process Technology |