Journal of Materials Engineering and Performance

, Volume 19, Issue 7, pp 1051–1053 | Cite as

Effects of Hydrogen on Ni47Ti44Nb9 Shape Memory Alloy

Article
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Abstract

The effects of hydrogen on the transformation characteristics of Ni47Ti44Nb9 shape memory alloy were investigated. Cathodic hydrogen charging was performed at a current density of 20 mA/cm2 in 0.5 mol/L H2SO4 solution at room temperature. The transformations of the hydrogenated specimens were characterized by differential scanning calorimetry, x-ray diffraction, and electrical resistivity measurement in details. For the hydrogen-charged NiTiNb alloy, the original reversible transformation between B2 and B19′ phase disappeared. Meanwhile, new transformation around 120 °C was present. This high temperature reversible transformation was confirmed to be the transformation between β-NbH phase and α-Nb(H) solid solution phase.

Keywords

β-NbH hydrogen charging NiTiNb phase transformation 
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Notes

Acknowledgments

The authors acknowledge the financial support of the National Natural Science Foundation of China (No. 50671120) and Specialized Research Fund for the Doctoral Program of Higher Education (No. 20050425002).

References

  1. 1.
    B.L. Pelton, T. Slater, and A.R. Pelton, Effects of Hydrogen in NiTi, SMST-97, Pacific Grove, CA, 1997, p 395–400Google Scholar
  2. 2.
    K. Yokoyama, K. Hamada, K. Moriyama, and K. Asaoka, Degradation and Fracture of Ni-Ti Superelastic Wire in an Oral Cavity, Biomaterials, 2001, 22, p 2257–2262CrossRefPubMedGoogle Scholar
  3. 3.
    N. Wade, Y. Adachi, and Y. Hosoi, A Role of Hydrogen in Shape Memory Effect of Ti-Ni Alloys, Scr. Metall. Mater., 1990, 24, p 1051–1055CrossRefGoogle Scholar
  4. 4.
    Y. Adachi, N. Wade, and Y. Hosoi, Effect of Hydrogen on the Shape Memory Effect and Transformation Behavior of Ti-Ni Alloy, J. Jpn Inst. Met., 1990, 54, p 525–531Google Scholar
  5. 5.
    T. Asaoka, T. Kamimura, H. Saito, and Y. Ishida, Effect of Hydrogen on Transformation Characteristics and Deformation Behavior in a TiNi Shape Memory Alloy, J. Jpn Inst. Met., 1992, 56, p 747–756Google Scholar
  6. 6.
    A. Pelton, C. Trépanier, X.Y. Gong, A. Wick, and K.C. Chen, Structural and Diffusional Effects of Hydrogen in TiNi, SMST-2003, Monterey, CA, 2003, p 277–282Google Scholar
  7. 7.
    K. Yokoyama, T. Ogawa, K. Takashima, K. Asaoka, and J. Sakai, Hydrogen Embrittlement of Ni-Ti Superelastic Alloy Aged at Room Temperature After Hydrogen Charging, Mater. Sci. Eng. A, 2007, 466, p 106–113CrossRefGoogle Scholar
  8. 8.
    K. Yokoyama, T. Eguchi, K. Asaoka, and M. Nagumo, Effect of Constituent Phase of Ni-Ti Alloy on Susceptibility to Hydrogen Embrittlement, Mater. Sci. Eng. A, 2004, 374, p 177–183CrossRefGoogle Scholar
  9. 9.
    S.A. Steward, Review of Hydrogen Isotope Permeability Through Materials, Lawrence Livermore National Laboratory Report UCRL-53441, 1983Google Scholar
  10. 10.
    K.N. Melton, J.L. Proft, and T.W. Duerig, Wide Hysteresis Shape Memory Alloys Based on the Ni-Ti-Nb System, Proc. MRS Int. Mtg. Adv. Mater. Tokyo, 1989, 9, p 165–170Google Scholar
  11. 11.
    L.C. Zhao, T.W. Duerig, and C.M. Wayman, Transformation anal Mechanical Behavior of Ni47Ti44Nb9 Shape Memory Alloy, Proc. MRS Int. Adv. Mater. Tokyo, 1989, 9, p 171–176Google Scholar
  12. 12.
    M. Piao, S. Miyazaki, K. Otsuka, and M. Nishida, Effects of Nb Addition on the Microstructure of Ti-Ni Alloys, Mater. Trans. JIM, 1992, 33, p 337–345Google Scholar
  13. 13.
    K. Hashi, K. Ishikawa, T. Matsuda, and K. Aoki, Microstructures and Hydrogen Permeability of Nb-Ti-Ni Alloys with High Resistance to Hydrogen Embrittlement, Mater. Trans. JIM, 2005, 46(5), p 1026–1031CrossRefGoogle Scholar
  14. 14.
    H.K. Birnbaum, M.L. Grossbeck, and M. Amano, Hydride Precipitation in Nb and Some Properties of NbH, J. Less-Common Met., 1976, 49, p 357–370CrossRefGoogle Scholar
  15. 15.
    W.M. Luo, K. Ishikawa, and K. Aoki, Hydrogen Permeability in Nb-Ti-Ni Alloys Containing Much Primary (Nb, Ti) Phase, Mater. Trans., 2005, 46(10), p 2253–2259CrossRefGoogle Scholar
  16. 16.
    S. Semboshi, N. Masahashi, T.J. Konno, and S. Hanada, Fracture Behavior of Niobium by Hydrogenation and Its Application for Fine Powder Fabrication, Metal. Mater. Trans. A, 2006, 37A, p 1301–1309CrossRefGoogle Scholar

Copyright information

© ASM International 2009

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringChina University of PetroleumBeijingChina

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