Metal Science and Heat Treatment

, Volume 23, Issue 5, pp 367–369 | Cite as

Hardening and the shape-memory effect in Ni-Ti alloys

  • V. M. Ermakov
  • V. I. Kolomytsev
  • V. A. Lobodyuk
  • L. G. Khandros
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Conclusions

  1. 1.

    The change in the microhardness and deflection during heating of quenched Ni−Ti alloys is due to formation of x phase and the initial stages of recrystallization.

     
  2. 2.

    The optimal heat treatment to obtain the highest hardness and deflection of Ni−Ti alloys with a composition close to equiatomic is water quenching from 1000° (15–20 min) and annealing at 450° for 30–60 min.

     

Keywords

Heat Treatment Recrystallization High Hardness Optimal Heat Optimal Heat Treatment 

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Literature cited

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    W. Buehler and R. Wiley, Trans. ASM, No. 1, 269 (1962).Google Scholar
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    T. Suzuki, Trans. JIM, No. 14, 31 (1973).Google Scholar
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    V. Kolomytsev, V. Lobodyuk, and L. Khandros, Phys. Status Solidi,50, 127 (1978a).Google Scholar
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    D. Koskimaki, M. Marcincowski, and A. Sastri, Trans. AIME, No. 9, 1863 (1969).Google Scholar
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    I. A. Arbuzova et al., "Deformation and recovery of shape during the martensitic transformation in a Cu−Sn alloy," Fiz. Met. Metalloved.,35, No. 6, 1278 (1973).Google Scholar
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    Yu. N. Koval' et al., "Effect of TMT on the shape-memory effect in Ti−Ni alloys," in: Martensitic Transformations in Metals and Alloys (ICOMAT-77) [in Russian], Naukova Dumka, Kiev (1979), p. 145.Google Scholar
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    V. I. Kolomytsev, V. A. Lobodyuk, and L. G. Khandros, "Electron-microscopic study of phase and structural changes that occur in Ti−Ni alloys during heating," in: Reports of the Second Republican Scientific—Technical Conference on Use of Electron Microscopy in Material Science, Biology, and Medicine [in Russian], Kiev (1979), p. 54.Google Scholar

Copyright information

© Plenum Publishing Corporation 1981

Authors and Affiliations

  • V. M. Ermakov
  • V. I. Kolomytsev
  • V. A. Lobodyuk
  • L. G. Khandros

There are no affiliations available

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