Abstract
The martensitic transformation temperature in shape memory alloys can be affected differently by aging above and below the transformation temperature. Under such circumstances the normally reversible transformation can be prevented and the martensite structure “stabilized”. This effect has been studied using electron microscopy, differential scanning calorimetry, and mechanical testing. Evidence is given of an apparently martensitic high temperature transformation, and a careful comparison is made of the stabilized and unstabilized states of the alloy. Three possible models for stabilization are considered in the light of the results obtained, and it is concluded that no single mechanism can be responsible for all the phenomena observed.
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References
D.P. Dunne and N. F. Kennon:Metals Forum, 1981, vol. 4, pp. 176–83.
N. F. Kennon:Met. Sci. Journal, 1972, vol. 6, pp. 64–66.
R. Rapacioli, M. Chandrasekaran, and L. Delaey: inShape Memory Effects in Alloys, J. Perkins, ed., Toronto, Plenum, New York, NY, 1975, pp. 365–78.
N. F. Kennon, D. P. Dunne, and L. Middleton:Metall. Trans. A, 1982, vol. 13A, pp. 551–55.
J.M. Cook and L. M. Brown:Scripta Metall., 1978, vol. 12, pp. 949–52.
R. Rapacioli and M. Ahlers:Acta Metall., 1979, vol. 27, pp. 777–84.
D. Schofield and A. P. Miodownik:Metals Technology, April 1980, pp. 167–73.
J.M. Cook: Ph.D. Thesis, University of Cambridge, England, 1980.
G. Scarsbrook, J.M. Cook, and W. M. Stobbs:ICOMAT 82, L. Delaey and M. Chandrasekaran, eds., Leuven, 1982, pp. 703–08.
A. Arab and M. Ahlers:ICOMAT 82, L. Delaey and M. Chandrasekaran, eds., Leuven, 1982, pp. 709–14.
J. Janssen, J. Van Humbeeck, M. Chandrasekaran, N. Mwamba, and L. Delaey:ICOMAT 82, L. Delaey and M. Chandrasekaran, eds., Leuven, 1982, pp. 639–45.
Raychem Corporation, French Patent No. 2301604.
W. M. Stobbs:J. Microscopy, 1983, vol. 129, pp. 307–14.
J.M. Cook, M.A. O'Keefe, D.J. Smith, and W. M. Stobbs:J. Microscopy, 1983, vol. 129, p. 295.
S. Chakravorty and CM. Wayman:Acta Metall., 1977, vol. 25, pp. 989–1000.
J. M. Cook and W. M. Stobbs: INCRA project No. 340, final report, 1983.
S. Kajiwara and Z. Nishiyama:lap. J. Appl. Phys., 1964, vol. 3, pp. 749–56.
L. Delaey and H. Warlimont:Zeit. Met., 1966, vol. 57, pp. 793–803.
J.A. Caro and M. Mondino:J. Appl. Physics, 1981, vol. 52, pp. 7147–54.
J. Van Humbeeck and L. Delaey:ICOMAT 82, L. Delaey and M. Chandrasekaran, eds., Leuven, 1982, pp. 691–95.
R. E. Smallman:Modem Physical Metallurgy, 3rd ed., Butterworths, 1970, p. 315.
M.L. Green and M. Cohen:ActaMetall., 1979, vol. 27, pp. 1523–38.
M. Ahlers, G. Barcelo, and R. Rapacioli:Scripta Metall., 1978, vol. 12, pp. 1075–78.
TA. Schroeder and CM. Wayman:Acta Metall., 1977, vol. 25, pp. 1375–91.
I. Lefever and L. Delaey:Acta Metall., 1972, vol. 20, pp. 797–802.
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Formerly with the Department of Metallurgy and Materials Science, University of Cambridge, England
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Scarsbrook, G., Cook, J.M. & Stobbs, W.M. The stabilization of martensite in Cu-Zn-AI shape memory alloys. Metall Trans A 15, 1977–1986 (1984). https://doi.org/10.1007/BF02646832
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DOI: https://doi.org/10.1007/BF02646832