Fatigue behavior of X40CrMoV 51 at high temperatures

  • Ruhi Yesildal
  • Sadri Sen
  • Irfan Kaymaz
Testing and Evaluation


The fatigue characteristics of the hot work tool steel X40CrMoV 51 (UNS number T20811) at high temperatures is presented. The temperatures for the experiments were chosen between 50–600 °C. The experiments used B-type cylindrical specimens machined from X40CrMoV in an R.R. Moore rotating bending type fatigue test machine obeying the high cycle principle. The temperature intervals for the experiments were chosen as 50, 100, 200, 300, 400, 500, and 600 °C, for which the fatigue limit for each interval at 2 × 106 cycles was determined. The fatigue limit of the material at room temperature (RT) is observed as 432 MPa, whereas it drops to 383 MPa at 400 °C. On the other hand, it stays almost constant between 400–600 °C, indicating that the material includes the elements forming strong carbides such as V, Mo, and Cr, which prevent the decrease of the fatigue limit due to higher temperatures.


fatigue high temperature rotating bending 


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Copyright information

© ASM International 2003

Authors and Affiliations

  • Ruhi Yesildal
    • 1
  • Sadri Sen
    • 1
  • Irfan Kaymaz
    • 1
  1. 1.Department of Mechanical EngineeringAtaturk UniversityErzurumTurkey

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