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

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


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.


Fatigue Heat Treatment Fatigue Strength Fatigue Test Fatigue Limit 
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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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