Soviet Physics Journal

, Volume 29, Issue 6, pp 488–493 | Cite as

Thermally activated plastic deformation in the presence of double potential barriers

  • V. P. Zharinov
Solid State Physics


We consider the process by which a dislocation overcomes a double potential barrier in a thermally activated plastic deformation. We use the framework of reaction rates without taking into account the form of the barrier profile. In order to take into account the possible delay of the dislocation in the potential well we introduce the probability for overcoming the barrier with one jump and the probability for the dislocation to fall into the well. As a result we establish that the experimentally determined activation parameters of a plastic deformation not only depend significantly on the form of: the barrier, but also on the delay probability of the dislocation in the potential well, which in turn is determined by the mechanism by which the moving dislocation dissipates energy. Since the dissipation of energy by the dislocation and the delay of the dislocation in the well grow with temperature, it is possible to observe a temperature interval where the stress flow also grows with temperature.


Plastic Deformation Stress Flow Potential Barrier Temperature Interval Activation Parameter 
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Literature cited

  1. 1.
    A. Evans and R. Rawlings, in: Thermally Activated Processes in Crystals [Russian translation], Mir, Moscow (1973), p. 172.Google Scholar
  2. 2.
    J. R. Hirth and W. D. Nix, Phys. Status Solidi,35, 177 (1969).Google Scholar
  3. 3.
    G. Schoeck, Phys. Status Solidi, 8, 499 (1965).Google Scholar
  4. 4.
    G. Schoeck, in: Dislocations in Solids, F. R. N. Nabarro, ed., North-Holland, Amsterdam, (1980), pp. 65–163.Google Scholar
  5. 5.
    V. D. Yaroshevich, Author's Abstract of Doctoral Dissertation, Leningrad (1972).Google Scholar
  6. 6.
    J. P. Hirth and J. Lothe, Theory of Dislocations, McGraw-Hill (1967).Google Scholar
  7. 7.
    V. M. Chernov, Fiz. Tverd. Tel.,18, 1194 (1976).Google Scholar
  8. 8.
    M. M. Savin and V. M. Chernov, Fiz. Met. Metalloved.,42, No. 2, 446 (1976).Google Scholar
  9. 9.
    T. O'D. Henley and A. S. Krausz, J. Appl. Phys.45, 2013 (1973).Google Scholar
  10. 10.
    T. O'D. Henley and A. S. Krausz, J. Appl. Phys.,45, 2016 (1973).Google Scholar
  11. 11.
    B. Faucher and A. S. Krausz, Scr. Met.,12, 175 (1978).Google Scholar
  12. 12.
    B. Faucher and A. S. Krausz, Scr. Met.,12, 913 (1978).Google Scholar
  13. 13.
    B. I. Smirnov, Dislocation Structure and Stengthening of Crystals [in Russian], Nauka, Leningrad (1981).Google Scholar
  14. 14.
    I. I. Papirov and G. F. Tikhinskii, Plastic Deformation of Beryllium [in Russian], Atomizdat, Moscow (1973), p. 30.Google Scholar
  15. 15.
    F. F. Lavrent'ev, O. P. Salita, and P. D. Shutyaev, Fiz. Met. Iletalloved.,41, No. 2, 412 (1976).Google Scholar
  16. 16.
    B. Wielke, A. Chalupka, and G. Schoeck, in: Strength of Metals and Alloys. Proc. ICSMA-5, Aachen, FRG, ang. 27–31, Pergamon Press (1979) Vol. 1, pp. 65–70.Google Scholar

Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • V. P. Zharinov
    • 1
  1. 1.Moscow Engineering Physics InstituteUSSR

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