Component strength of heat-treated sintered steels

  Yieldable local voltage amplitude Sa depending on the HBV90 Copyright: © IWM


Tobias Hajeck © Copyright: IWM


Tobias Hajeck

Group Fatigue and Fracture Mechanics


+49 241 80 99534




The overall objective of the project is the development of a calculation concept for component design for the material group of sintered steels. The calculation concept should make it possible to include sintered steels as a material group in the FKM guideline "Computational strength verification for machine components". For this purpose, data on the fatigue strength characteristics of sintered steels will be compiled in a comprehensive literature search. General relationships (e.g. between density, hardness, highly loaded volume and vibration resistance) are derived from this database.

As a basis for the calculation a reference fatigue strength is to be established which can be estimated from a simple hardness measurement. Extensive vibration tests are carried out to supplement the existing database with vibration strengths of heat-treated sintered steels.

The developed design methodology is verified by component tests.


  • Derivation of correlations from literature data
  • Development of an estimation method for a reference fatigue strength
    • Correlation: density à hardness à vibration resistance
  • Development of a static strength verification
  • Experimental determination of the fatigue strength of heat treated sintered steels as a function of density, stress ratio and highly loaded volume (HBV90)
  • Transfer of the parameters into the framework of the FKM guideline
  • Validation of the method by component tests

Project partners

  • Fraunhofer LBF Darmstadt

Research Association

  • Research Board of Trustees in Mechanical Engineering FKM
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