The effects of cobalt elements addition on Ti2Ni phases, thermodynamics parameters, crystal structure and transformation temperature of NiTi shape memory alloys

  • Mediha KökEmail author
  • Hanaa Shahab Ahmed Zardawi
  • Ibrahim Nazem Qader
  • M. Sait Kanca
Regular Article


By adding cobalt into NiTi-based shape memory alloy, the change of phase transformation, microstructure, and magnetic property of alloys has been investigated in austenite and martensite phases. NiTi and NiTiCo alloys with various rates of cobalt element, 2-6at.%, were prepared by arc-melting furnace, which had a high-vacuum level to avoid contamination, and then samples homogenized at 1323 K for 24h. Subsequently, at room temperature each crystal structure, the microstructural phases, change in chemical composition ratio, and magnetization of the alloys, were investigated by using XRD, optical microscope, SEM-EDX, and PPMS equipment, respectively. The results of these measurements showed that, at room temperature, NiTiCo alloys with cobalt compositions of 0, 2, and 3 (at.%) exhibit the austenite phase, while the rest of the alloys show the martensite phase. Also, the enthalpy change for the first three alloys increased with increasing cobalt addition, however its value decreased suddenly for NiTiCo alloys with 4, 5, and 6 (at.%) cobalt doping.


  1. 1.
    R.R. Adharapurapu, K.S. Vecchio, Exp. Mech. 47, 365 (2007)CrossRefGoogle Scholar
  2. 2.
    Z. Zhang, J. Frenzel, K. Neuking, G. Eggeler, Mater. Transact. 47, 661 (2006)CrossRefGoogle Scholar
  3. 3.
    D.J. Fernandes, R.V. Peres, A.M. Mendes, C.N. Elias, ISRN Dentistry 2011, 132408 (2011)Google Scholar
  4. 4.
    H.-j. Jiang, C.-b. Ke, S.-s. Cao, M. Xiao, X.-p. Zhang, Trans. Nonfer. Metals Soc. China 23, 2029 (2013)CrossRefGoogle Scholar
  5. 5.
    J. Bhagyaraj, K. Ramaiah, C. Saikrishna, S. Bhaumik, J. Alloys Compd. 581, 344 (2013)CrossRefGoogle Scholar
  6. 6.
    N. El-Bagoury, Metals Mater. Int. 22, 468 (2016)CrossRefGoogle Scholar
  7. 7.
    M. Carroll, C. Somsen, G. Eggeler, Scr. Mater. 50, 187 (2004)CrossRefGoogle Scholar
  8. 8.
    M. Dovchinvanchig, C. Zhao, S. Zhao, X. Meng, Y. Jin, Y. Xing, Adv. Mater. Sci. Eng. 2014, 489701 (2014)CrossRefGoogle Scholar
  9. 9.
    Y.-N. Zhao, S.-Y. Jiang, Y.-Q. Zhang, Y.-L. Liang, Acta Metall. Sin. 30, 762 (2017)CrossRefGoogle Scholar
  10. 10.
    E. Kassab, L. Neelakantan, M. Frotscher, S. Swaminathan, B. Maaß, M. Rohwerder, J. Gomes, G. Eggeler, Mater. Corros. 65, 18 (2014)CrossRefGoogle Scholar
  11. 11.
    N. El-Bagoury, Mater. Sci. Technol. 30, 1795 (2014)CrossRefGoogle Scholar
  12. 12.
    N. El-Bagoury, M.A. Amin, H. Shokry, Int. J. Electrochem. Sci. 8, 1246 (2013)Google Scholar
  13. 13.
    N.D. Alqarni, J. Wysocka, N. El-Bagoury, J. Ryl, M.A. Amin, R. Boukherroub, RSC Adv. 8, 19289 (2018)CrossRefGoogle Scholar
  14. 14.
    H. Hosoda, S. Hanada, K. Inoue, T. Fukui, Y. Mishima, T. Suzuki, Intermetallics 6, 291 (1998)CrossRefGoogle Scholar
  15. 15.
    R. Manjeri, D. Norwich, F. Sczerzenie, X. Huang, M. Long, M. Ehrlinspiel, J. Mater. Engin. Perform. 25, 894 (2016)CrossRefGoogle Scholar
  16. 16.
    T. Goryczka, P. Ochin, J. Lelatko, presented at the Materials Science Forum (2013) (unpublished)Google Scholar
  17. 17.
    S.N. Saud, T.A.A. Bakar, E. Hamzah, M.K. Ibrahim, A. Bahador, Metall. Mater. Trans. A 46, 3528 (2015)CrossRefGoogle Scholar
  18. 18.
    I.N. Qader, M. Kök, F. Dağdelen, Physica B 553, 1 (2019)ADSCrossRefGoogle Scholar
  19. 19.
    X.T. Zu, L.P. You, S. Zhu, Z.G. Wang, J.H. Wu, L.M. Wang, MRS Proc. 792, R3.28 (2003)CrossRefGoogle Scholar
  20. 20.
    S.N. Saud, E. Hamzah, T. Abubakar, M. Zamri, M. Tanemura, J. Therm. Anal. Calorim. 118, 111 (2014)CrossRefGoogle Scholar
  21. 21.
    M. Kök, G. Ateş, Eur. Phys. J. Plus 132, 185 (2017)CrossRefGoogle Scholar
  22. 22.
    S. Xiaoyun, L. Yan, Z. Fei, L. Shusuo, Chinese J. Aeronaut. 23, 715 (2010)CrossRefGoogle Scholar
  23. 23.
    S. Hsieh, S. Wu, J. Mater. Sci. 34, 1659 (1999)ADSCrossRefGoogle Scholar
  24. 24.
    L. Sheng, Y. Yang, T. Xi, presented at the IOP Conference Series: Materials Science and Engineering (2018) (unpublished)Google Scholar
  25. 25.
    S. Chatterjee, T. Abinandanan, K. Chattopadhyay, J. Mater. Sci. 41, 643 (2006)ADSCrossRefGoogle Scholar
  26. 26.
    P. Novák, L. Mejzlíková, A. Michalcová, J. Čapek, P. Beran, D. Vojtech, Intermetallics 42, 85 (2013)CrossRefGoogle Scholar
  27. 27.
    S. Gururaja, M. Taya, Y. Kang, J. Appl. Phys. 102, 064910 (2007)ADSCrossRefGoogle Scholar

Copyright information

© Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Firat UniversityFaculty of Science, Department of PhysicsElazığTurkey
  2. 2.University of GarmianCollege of Education, Department of PhysicsKalarIraq
  3. 3.University of RaparinCollege of Science, Department of PhysicsSulaimanyahIraq

Personalised recommendations