Characterization of Co-Ni Based Ferromagnetic Shape Memory Alloy

자성 Co-Ni 계 형상기억합금의 특성

  • Han, Ji-Won (Department of Mechanical Engineering, Hoseo University) ;
  • Park, Sung Bum (Department of Safety Engineering, Dongguk University)
  • 한지원 (호서대학교 기계공학과) ;
  • 박성범 (동국대학교 안전공학과)
  • Received : 2015.04.22
  • Accepted : 2015.07.02
  • Published : 2015.08.31


The magnetic shape memory alloys have recently received a lot of attention due to the considerable progress achieved in understanding the particular importance and the development of the factors. Among these alloys, the ferromagnetic Co-Ni- alloys have been concerned specially because of the thermoelastic character of the fcc (g) - bct (a) martensitic transformation which exhibits under the action of the temperature (shape memory effect), the stress (superelasticity) and the magnetic field (magnetoelasticity). The morphological, the crystallographical, and the thermal characteristics of thermally induced martensite in Co-35.3Ni-11.3Al(wt.%) and Co-28.1Ni-47.4Fe-3.3Ti (wt.%) alloy have been investigated by the scanning electron microscope (SEM), the X-ray Diffraction (XRD), and the differential scanning calorimeter (DSC).


Supported by : 호서대학교


  1. K. Otsuka and C. M. Wayman, "Shape Memory Materials", Cambridge University Press, 1998.
  2. V. Michaud, "Can Shape Memory Alloy Composites be Smart", Scripta Materials, Vol.50, pp. 249-253, 2004.
  3. K. Ullakko, J. K. Huang, V. V. Kokorin and R. C. O'handley, "Magnetically Controlled Shape Memory Effect in Ni2MnGa Intermetallics", Scripta Materials, Vol.36, pp.1133-1138, 1997.
  4. X. Jin, M. Marioni, D. Bono, S. M. Allen and R. C. O'handley, "Empirical Mapping of Ni-Mn-Ga Properties with Composition and Valence Electron Concentration", Journal of Applied Physics, Vol.91, pp. 8222-8224, 2002.
  5. R. Oshima, S. Sugimoto, M. Sugiyama, T. Hamada and F. E. Fujita, "Shape Memory Effect in Ordered Fe3Pt alloy Associated with the FCC-FCT Thermoelasticmartensite Transformation", Transactions of the Japan Institute of Metals, Vol.26, No. 7, pp. 523-524, 1985.
  6. T. Sohmura, R. Oshima and F. E. Fugita, "Thermoelastic FCC-FCT Martensitic Transformation of Fe-Pd Alloy", Scripta Metallurgies, Vol.14, pp. 855-856, 1980.
  7. T. Maki, K. Kobayashi, M. Minato and I. Tamura, "Thermoelasticmartensite in an Ausaged Fe-Ni-Co-Ti Alloy", Scripta Metallurgies, Vol.18, pp. 1105-1109, 1984.
  8. T. Furuharaa, H. Kawatab, S. Moritoc and T. Makid, "Crystallography of Upper Bainite in Fe-Ni-C Alloys", Materials Science and Engineering: A, Vol. 431, pp. 228-236, 2006.
  9. K. Enami, S.Nenno and Y. Minato, "Shape Memory Effect Associated with the Martensitic Transformation in 304 Type Stainless Steel", Scripts Metallurgies, Vol. 5, No. 8, pp. 663-668, 1971.
  10. A. Sato, H. Kubo and T. Maruyama, "Mechanical Properties of Fe-Mn-Si Based SMA and the Application Materials", Materials Transactions, Vol. 47, No. 3, pp. 571-579, 2006.
  11. K, Tsuzaki, Y. Natsume and T. Maki, "Transformation Reversibility in Fe-Mn-Si Shape Memory Alloy", J. Phys. IV France, Vol. 5, pp.409-414, 1995.