Journal of Materials Science

, Volume 29, Issue 6, pp 1481–1486 | Cite as

Mechanically alloyed Ni50Ti50 and its transformation by thermal treatments

  • T. Itsukaichi
  • S. Ohura
  • J. G. Cabañas-Moreno
  • M. Umemoto
  • I. Okane


Amorphous powders have been obtained by mechanical alloying (MA) equiatomic powder mixtures of nickel and titanium. The amorphous phase thus formed decomposes upon heating first into the cubic B2 NiTi intermetallic compound; however, further heating promotes the precipitation of the intermetallics Ni3Ti and NiTi2. These transformations are shown to occur also in mechanically ground (MG) NiTi wire, but not in this same material exempted from ball-milling processing. It is suggested that this unique behaviour is brought about by the particular structural features of the MA or MG powders, which promote the otherwise sluggish decomposition of B2 NiTi.


Polymer Precipitation Titanium Nickel Structural Feature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    R. J. Wasilewski, in “Shape Memory Effects in Alloys” (Plenum Press, New York, 1975) p. 245.CrossRefGoogle Scholar
  2. 2.
    K. N. Melton and O. Mercier, Acta Metall. 29 (1981) 393.CrossRefGoogle Scholar
  3. 3.
    D. Koskimaski, M. J. Marcinkowski and A. S. Sastri, Trans. AIME 245 (1969) 1883.Google Scholar
  4. 4.
    S. P. Gupta, K. Mukherjee and A. A. Johnson, Mater. Sci. Eng. 11 (1973) 283.CrossRefGoogle Scholar
  5. 5.
    J. L. Murray (ed), “Phase Diagrams of Binary Titanium Alloys” (ASM International, Metals Park, OH, 1987) p. 197.Google Scholar
  6. 6.
    P. Duwez and J. L. Taylor, Trans. AIME 188 (1950) 1173.Google Scholar
  7. 7.
    R. J. Wasilewski, S. R. Butler, J. E. Hanlon and D. Worden, Metall. Trans. 2 (1971) 229.CrossRefGoogle Scholar
  8. 8.
    S. P. Gupta, A. A. Johnson and K. Mukherjee, J. Phys. Soc. Jpn 31 (1971) 605.CrossRefGoogle Scholar
  9. 9.
    F. S. Wang, W. J. Buehler and S. T. Pickart, J. Appl. Phys. 36 (1965) 3232.CrossRefGoogle Scholar
  10. 10.
    G. R. Purdy and J. G. Parr, Trans. AIME 221 (1961) 636.Google Scholar
  11. 11.
    W. J. Buehler and R. C. Wiley, Trans. ASM 55 (1962) 269.Google Scholar
  12. 12.
    W. J. Buehler, J. V. Gilfrich and R. C. Wiley, J. Appl. Phys. 34 (1963) 1475.CrossRefGoogle Scholar
  13. 13.
    D. Y. Li, X. F. Wu and T. Ko, Acta Metall. Mater. 38 (1990) 19.CrossRefGoogle Scholar
  14. 14.
    Y. Liu and P. G. McCormick, ibid.38 (1990) 1321.CrossRefGoogle Scholar
  15. 15.
    T. Itsukaichi, S. Ohura, J. G. Cabañas-Moreno, M. Umemoto and I. Okane, Mater. Sci. Tech. in press.Google Scholar
  16. 16.
    L. Battezzati, G. Cocco, L. Schiffini and S. Enzo, Mater. Sci. Eng. 97 (1988) 121.CrossRefGoogle Scholar
  17. 17.
    R. B. Schwarz, R. R. Petrich and C. K. Saw, J. Non-Cryst. Solids 76 (1985) 281.CrossRefGoogle Scholar
  18. 18.
    E. Hellstern and L. Schultz, Mater. Sci. Eng. 93 (1987) 213.CrossRefGoogle Scholar
  19. 19.
    G. Cocco, S. Enzo, L. Schiffini and L. Battezzati, ibid.97 (1988) 43.CrossRefGoogle Scholar
  20. 20.
    D. G. Morris and M. A. Morris, J. Less-Common Metals 145 (1988) 277.CrossRefGoogle Scholar
  21. 21.
    S. Enzo, M. Sampoli, G. Cocco, L. Sciffini and L. Battezzati, Philos. Mag. B59 (1989) 169.CrossRefGoogle Scholar
  22. 22.
    K. J. Wang, T. D. Shen, J. T. Wang and M. X. Quan, Scripta Metall. Mater. 25 (1991) 2227.CrossRefGoogle Scholar
  23. 23.
    U. Mizutani and C. H. Lee, J. Mater. Sci. 25 (1990) 399.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • T. Itsukaichi
    • 1
  • S. Ohura
    • 1
  • J. G. Cabañas-Moreno
    • 1
    • 2
  • M. Umemoto
    • 1
    • 2
  • I. Okane
    • 1
    • 2
  1. 1.Graduate SchoolToyohashi University of TechnologyAichiJapan
  2. 2.Department of Production Systems EngineeringToyohashi University of TechnologyAichiJapan

Personalised recommendations