Abstract
Effect of the magnetic field on the martensitic transformation of Co-Ni-Al single-crystal was investigated by differential thermal analysis (DTA) and the in-situ microstructure observation under magnetic field. The martensitic transformation temperatures Ms and Mf of the Co 34.5Ni35.5Al30 (at.%) single-crystal specimen showing the martensitic transformation from the paramagnetic austenite (B2) to the ferromagnetic martensite (L10) slightly increased under the magnetic field and those temperatures shifts were about 1.3 °C at 1.0 T. It was also observed in the Co34.5Ni35.5Al30 single-crystal specimen that the phase boundaries between the austenite and the martensite slightly move by applying the magnetic field of 1.0 T. These results are discussed on the basis of a thermodynamic stability of the martensite phase under the magnetic field. The martensitic and the magnetic transformation behaviors of the Ni-Al-Co alloys are also reviewed.
| Original language | English |
|---|---|
| Pages (from-to) | 159-168 |
| Number of pages | 10 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5053 |
| DOIs | |
| Publication status | Published - 2003 |
| Event | PROCEEDINGS OF SPIE SPIE - The International Society for Optical Engineering: Smart Structures and Materials 2003 Active Materials: Behavior and Mechanics - San Diego, CA, United States Duration: 2003 Mar 3 → 2003 Mar 6 |
Keywords
- Co-Ni-Al
- Ferromagnetic shape memory alloys
- Magnetic field-induced martencitic transformation
- Martensitic transformation