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Materials Science

, Volume 30, Issue 4, pp 424–430 | Cite as

Mechanism of growth of short cracks and durability of workpieces

  • A. V. Fishgoit
  • V. M. Maistrov
  • M. A. Rozanov
Article
  • 18 Downloads

Abstract

The principal regularities of the growth of short cracks were established by direct observation with a scanning electron microscope. We propose a model that describes their growth and enables one to calculate the kinetics of growth of short cracks from both a smooth surface and stress concentrators. The growth of shorts crack is represented as successive failures of periodically located structural obstacles upon accumulation of critical plastic strain under cyclic loading.

Keywords

Electron Microscope Scanning Electron Microscope Plastic Strain Smooth Surface Direct Observation 
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.

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References

  1. 1.
    S. A. Vigdorchik, A. V. Fishgoit, and V. V. Luk'yanenko, “On the mechanism of fatigue crack growth in VT6, D16, and AK4-1 alloys,” in:Treatment of Light and Heat-Resistant Alloys [in Russian], Nauka, Moscow (1981).Google Scholar
  2. 2.
    B. A. Kolachev, A. V. Fishgoit, and I. A. Lebedev, “Direct observation of fatigue crack growth in VT6L alloy,”Fiz. Met. Metalloved. 59, No. 3, 600–604 (1985).Google Scholar
  3. 3.
    A. V. Fishgoit, V. M. Maistrov, A. A. Il'in, and M. A. Rozanov, “Interaction of short cracks with the structure of metals,”Fiz.-Khim. Mekh. Mater. 25, No. 6, 24–27 (1989).Google Scholar
  4. 4.
    V. M. Maistrov, M. A. Rozanov, and A. V. Fishgoit, “A model of short crack growth,” in:Abstracts of the 23th All-Union Conf. on Problems of the Strength of Engines [in Russian], Moscow (1990), p. 121.Google Scholar
  5. 5.
    A. V. Fishgoit, V. M. Maistrov, and V. M. Rozanov, “The short crack growth model,” in:Strength and Fracture, Vol. 4 (1991).Google Scholar
  6. 6.
    A. M. Vasyutin, “Criterion of elastoplastic fracture as applied to short cracks,”Zavod. Lab. 51, No. 4, 71–73 (1985).Google Scholar
  7. 7.
    S. Pearson, “Initiation of fatigue cracks in commercial aluminium alloys and the subsequent propagation of very short cracks,”Eng. Fract. Mech. 7, No. 2, 235–247 (1975).Google Scholar
  8. 8.
    J. R. Griffiths and P. R. J. Owen, “An elastic-plastic stress analysis for a notched bar in plane strain bending,”J. Mech. Phys. Solids 19, 419–431 (1971).Google Scholar
  9. 9.
    M. H. El Haddad, N. E. Dowling, T. H. Tooper, and K. N. Smith, “J-integral applications for short fatigue cracks at notches,”Int. J. Fract. 16, No. 1, 15–30 (1980).Google Scholar
  10. 10.
    I. V. Fridman,Mechanical Properties of Metals [in Russian], Mashinostroenie, Moscow (1974).Google Scholar

Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • A. V. Fishgoit
  • V. M. Maistrov
  • M. A. Rozanov

There are no affiliations available

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