Improving Shape Memory in Copper-Aluminum-Nickel Alloys
Author Information
Author(s): Mikel Pérez-Cerrato, Jose F. Gómez-Cortés, Ernesto Urionabarrenetxea, Isabel Ruiz-Larrea, Fernando Carreño, Ízaro Ayesta, María L. Nó, Nerea Burgos, Jose M. San Juan, Hansang Kwon
Primary Institution: University of the Basque Country
Hypothesis
Can powder metallurgy processing enhance the superelasticity and shape memory properties of Cu–Al–Ni alloys?
Conclusion
The study demonstrates that powder metallurgy processing significantly improves the mechanical and functional properties of Cu–Al–Ni shape memory alloys.
Supporting Evidence
- The processing steps resulted in a 40 °C increase in martensitic transformation temperatures.
- Outstanding superelastic behavior of 4.5% in tension was achieved.
- A fully recoverable shape memory effect of ±5% in bending was demonstrated.
- The methodology allows for reproducible and controlled functional properties.
Takeaway
This research shows how a special way of making metal can help it remember shapes and stretch without breaking, which is useful for many technologies.
Methodology
The alloy was produced using gas atomization, followed by hot isostatic pressing and hot rolling, with thermal treatments to enhance properties.
Limitations
The study does not address long-term stability of the properties or the effects of different processing parameters on performance.
Digital Object Identifier (DOI)
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