Based on the calculated NB and bM values, the Wöhler curves are then calculated with scatter bands for Pf = 5%, 50% and 95%. The results are shown in Fig. 5 together with the fracture load cycles of 11 ESV performed with conventional Hourglass specimens.
Fig. 5 illustrates that the conventionally determined service lives can be reliably described by the scatter bands calculated on the basis of SteBLifemsb. The fatigue strength coefficients and exponents of the calculated and conventionally determined Wöhler data are in the same value range.
Summary
The paper shows how non-destructive measurement methods based on temperature can be used in the context of short-term procedures for service life calculation. The procedure is presented using the example of normalized carbon steel grade C45E and the SteBLife method.
SteBLife opens up the possibility of providing significantly more inform
Acknowledgements
The author would like to thank the German Research Foundation (DFG) for financial support of the research project (STA 1133/6-1). Further thanks go to the companies Shimadzu Germany/Europe and Micro-Epsilon for support with the experimental infrastructure.
Literature
H.-J. Christ: Ermüdungsverhalten metallischer Werkstoff
