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Materials Science

, Volume 44, Issue 4, pp 524–529 | Cite as

Low-temperature cyclic crack resistance of steels of railroad wheels

  • O. P. Ostash
  • I. M. Andreiko
  • V. V. Kulyk
  • I. H. Uzlov
  • K. I. Uzlov
  • O. I. Babachenko
Article
  • 35 Downloads

Abstract

We have established that the steels of high-and medium-strength railroad wheels in the presence of fatigue-crack-type defects are susceptible to low-temperature (up to −60°C) embrittlement only for high amplitudes of cyclic loading, when the growth rate of a fatigue crack exceeds 10−7 m/cycle. Here, the temperature of cyclic ductile-brittle transition for these steels constitutes −20 and −40°C, respectively. We have shown that the permissible and temperature-independent (within the range from 20 to −60°C ) size of a fatigue crack on the rim surface of the wheels under study does not exceed 1.9–2.5 mm for a hoop stress range of 400 MPa and 0.6–0.8 mm for 700 MPa. These results enable us to conclude that, for high-strength railroad wheels working at low climatic temperatures, it is necessary to carry out their flaw inspection with sensitivity to surface cracks of millimeter size.

Keywords

Fatigue Fatigue Crack Stress Intensity Factor Fatigue Threshold Wheel Steel 
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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Copyright information

© Springer Science+Business Media, Inc. 2008

Authors and Affiliations

  • O. P. Ostash
    • 1
  • I. M. Andreiko
    • 1
  • V. V. Kulyk
    • 1
  • I. H. Uzlov
    • 2
  • K. I. Uzlov
    • 2
  • O. I. Babachenko
    • 2
  1. 1.Karpenko Physicomechanical InstituteUkrainian Academy of SciencesLvivUkraine
  2. 2.Nekrasov Institute of Ferrous MetallurgyUkrainian Academy of SciencesDnipropetrovs’kUkraine

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