Martensitic and magnetic transformations of Ni–Ga–Fe–Co ferromagnetic shape memory alloys
✍ Scribed by Y. Imano; T. Omori; K. Oikawa; Y. Sutou; R. Kainuma; K. Ishida
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 384 KB
- Volume
- 438-440
- Category
- Article
- ISSN
- 0921-5093
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Ni-Fe-Ga-Co is a promising system for magnetic shape memory alloy applications, due to its good ductility, mobile twin boundaries and high transformation temperatures. Unlike previous studies which focused on compositions with a Ga content of 27 at.%, here the martensitic transformation and magnetic
Three polycrystalline Ni 53.5+x -Fe 19.5-x -Ga 27.0 alloys, with x = 0, 0.5, 1.5 (at.%), have been aged at 520 and 670 K. The initial increase of martensitic transformation temperatures upon ageing has been attributed to a decrease of L2 1 order. The alloys with lower Fe content show remarkable ther