Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Effects of Ni Addition on the Microstructures and Magnetic Properties of Fe70-xPd30Nix High-Temperature Ferromagnetic Shape Memory Alloys

  • Lin, Chien-Feng (Department of Mechanical and Automatic Engineering, National Kaohsiung First University of Science and Technology) ;
  • Yang, Jin-Bin (Department of Mechanical and Automatic Engineering, National Kaohsiung First University of Science and Technology)
  • Received : 2011.10.31
  • Accepted : 2012.05.03
  • Published : 2012.06.30
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Abstract

This study investigated the effects of adding a third alloying element, Ni, to create $Fe_{70-x}Pd_{30}Ni_x$ (x = 2, 4, 6, 8 at.% Ni) ferromagnetic shape memory alloys (FSMAs). The Ni replaced a portion of the Fe. The $Fe_{70-x}Pd_{30}Ni_x$ alloys were homogenized through hot and cold forging to gain a ~38% reduction in thickness, next they were solution-treated (ST) with annealing recrystallization at $1100^{\circ}C$ for 8 h and quenched in ice brine, and then aged at $500^{\circ}C$ for 100 h. Investigation of the microstructures and magnetostriction indicated that the greater Ni amount in the $Fe_{70-x}Pd_{30}Ni_x$ alloys reduced saturation magnetostriction at room temperature (RT). It was also observed that it was more difficult to generate annealed recrystallization. However, with greater Ni addition into the $Fe_{70-x}Pd_{30}Ni_x$ (x = 6, 8 at.% Ni) alloys, the $L1_0+L1_m$ twin phase decomposition into stoichiometric $L1_0+L1_m+{\alpha}_{bct}$ structures was suppressed after the $500^{\circ}C$/100 h aging treatment. The result was that the $Fe_{70-x}Pd_{30}Ni_x$ (x = 6, 8 at.% Ni) alloys maintained a high magnetostriction and magnetostrictive susceptibility (${\Delta}{\lambda}{_\parallel}{^s}/{\Delta}H$) after the alloys were aged at $500^{\circ}C$ for 100 h. This magnetic property of the $Fe_{70-x}Pd_{30}Ni_x$ (x = 6, 8 at.% Ni) alloys make it suitable for application in a high temperature (T > $500^{\circ}C$) and high frequency environments.

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References

  1. P. K. Kumar and D. C. Lagoudas, Acta Mater. 58, 1618 (2010). https://doi.org/10.1016/j.actamat.2009.11.006
  2. Y. Xin, Y. Li, and Zongde Liu, Scripta Mater. 63, 35 (2010). https://doi.org/10.1016/j.scriptamat.2010.02.044
  3. Y. Li, Y. Xin, L. Chai, Y. Mad, and H. Xu, Acta Mater. 58, 3655 (2010). https://doi.org/10.1016/j.actamat.2010.03.001
  4. J. Cui, T. W. Shield, and R. D. James, Acta Mater. 52, 35 (2004). https://doi.org/10.1016/j.actamat.2003.08.024
  5. Y. C. Lin, C. F. Lin, J. B. Yang, and H. T. Lee, J. Appl. Phys. 109, A912 (2011).
  6. J. G. Speer and D. V. Edmonds, Acta Metal. Mater. 36, 1015 (1988). https://doi.org/10.1016/0001-6160(88)90156-3
  7. F. Appel, P. A. Beaven, and R. Wagner, Acta Metal. Mater. 41, 1721 (1993). https://doi.org/10.1016/0956-7151(93)90191-T
  8. J. W. Christian, The Theory of Transformations in Metals and Alloys, Pergamon Press, Oxford (1965).
  9. K. C. Atli, I. Karaman, R. D. Noebe, and H. J. Maier, Scripta Mater. 64, 315 (2011). https://doi.org/10.1016/j.scriptamat.2010.10.022
  10. C. F. Lin and J. B. Yang, IEEE Trans. Magn. 45, 2499 (2009). https://doi.org/10.1109/TMAG.2009.2018673

Cited by

  1. Microstructures and Magnetic Properties of Fe70−x Pd30Ni x High-Temperature Ferromagnetic Shape Memory Alloys vol.28, pp.3, 2015, https://doi.org/10.1007/s10948-014-2690-1