Soviet Physics Journal

, Volume 28, Issue 2, pp 118–121 | Cite as

Influence of the stress field of a tilt boundary on a Frank-Read source generating dislocations under the action of ultrasound

  • N. A. Tyapunina
  • V. V. Blagoveshchenskii
  • A. L. Lomakin
Solid State Physics

Abstract

The influence of a nonuniform field of internal stresses and the generation of a dislocation loop by a Frank-Read source operating under the action of an alternating load is investigated by computer simulation. It is shown that the field of a tilt boundary affects every stage of development of a dislocation loop until its closure. The influence of the boundary field is determined by the ratio between the length of the source and the space scale of the field nonuniformities. It is established that not only the value of the dynamic yield point but also the form of its dependence on the ultrasonic frequency can vary in an internal stress field.

Keywords

Yield Point Computer Simulation Stress Field Internal Stress Dislocation Loop 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. 1.
    V. V. Blagoveshchenskii and N. A. Tyapunina, Dokl. Akad. Nauk SSSR,254, No. 4, 869 (1980).Google Scholar
  2. 2.
    N. A. Tyapunina and V. V. Blagoveshchenskii, Phys. Status Solidi A,69, 77 (1982).Google Scholar
  3. 3.
    G. M. Zinenkova, E. V. Shtrom, and N. V. Kukharenko, in: Dynamics of Dislocations [in Russian], FTINT Akad. Nauk UkrSSR, Kharkov (1968), pp. 235–242.Google Scholar
  4. 4.
    N. A. Tyapunina, G. M. Zinenkova, and E. V. Shtrom, Phys. Status Solidi A,46, 327 (1978).Google Scholar
  5. 5.
    N. A. Tyapunina, in: Physics of Strain Hardening [in Russian], Naukova Dumka, Kiev (1972), pp. 228–246.Google Scholar
  6. 6.
    V. D. Natsik and K. A. Chishko, Fiz. Tverd. Tela (Leningrad),17, 342 (1975).Google Scholar
  7. 7.
    V. V. Blagoveshchenskii, Author's Abstract of Candidate's Dissertation, Mosk. Gos. Univ., Moscow (1982).Google Scholar
  8. 8.
    S. I. Igonin and A. A. Predvoditelev, Vestn. Mosk. Univ., Ser. Fiz. Astron.,17, No. 3, 338 (1976).Google Scholar
  9. 9.
    G. N. Dubnova, V. L. Indembom, and A. L. Shtol'berg, Fiz. Tverd. Tela (Leningrad),10, No. 6, 1760 (1968).Google Scholar
  10. 10.
    V. V. Blagoveshchenskii, G. M. Zinenkova, and N. A. Tyapunina, in: Computer Modeling of Defects in Crystals [in Russian], FTI Akad. Nauk SSSR, Leningrad (1979), pp. 148–149.Google Scholar
  11. 11.
    N. A. Tyapunina, V. V. Blagoveshchenskii, et al., Izv. Vyssh. Uchebn. Zaved., Fiz., No. 6, 118 (1982).Google Scholar

Copyright information

© Plenum Publishing Corporation 1985

Authors and Affiliations

  • N. A. Tyapunina
    • 1
  • V. V. Blagoveshchenskii
    • 1
  • A. L. Lomakin
    • 1
  1. 1.M. V. Lomonosov State UniversityMoscow

Personalised recommendations