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Effect of high-temperature thermomechanical treatment (HTMT) on the fatigue strength of high-carbon steels

  • O. N. Romaniv
  • N. L. Kuklyak
  • I. P. Vyval
Article
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Summary

Fatigue tests on steels 9KhS and ShKh15 revealed anisotropy in fatigue properties of these steels after HTMT.

In asymmetric cycling, the fatigue limit depends to a large extent on the magnitude and direction of the mean stress of the cycle. Superimposition of a direct load (in the entire range of τ0 studied) increases the fatigue limit (sometimes by 100%), of steel subjected to HTMT; when an inverse load is superimposed, the fatigue limit after HTMT is lower than after a conventional heat treatment.

The increase in fatigue strength of high-carbon steels after HTMT is achieved in the first instance as a result of the directional congruence of “weak” regions and external stresses. This effect becomes particularly evident under conditions of asymmetric stress cycling with a superimposed static load.

Keywords

Fatigue Heat Treatment Fatigue Strength Fatigue Test Fatigue Limit 
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

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Copyright information

© The Faraday Press, Inc 1967

Authors and Affiliations

  • O. N. Romaniv
    • 1
  • N. L. Kuklyak
    • 1
  • I. P. Vyval
    • 1
  1. 1.Institute of Physics and Mechanics AS UkrSSRL'vov

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