Multiaxial fatigue strength assessment of electroslag remelted 50CrMo4 steel crankshafts

Martin Leitner, Zafer Tuncali, Ralf Steiner, Florian Grün

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14 Citations (Scopus)


This work investigates the fatigue strength of multiaxially-loaded gas engine crankshafts incorporating electroslag remelted 50CrMo4 steel. Uniaxial fatigue tests with small-scale round specimens before and after performing the ESR process are conducted. The results reveal that the high-cycle fatigue strength at the run-out region significantly decreases by 21% if no ESR-treatment is performed. Multiaxial fatigue tests under proportional normal and shear stress loading demonstrate that the elliptical model by Gough and Pollard leads to a minor underestimation of 5% compared to the test results. An application of several state-of-the-art equivalent stress hypotheses utilizing the critical plane approach is presented and the estimated results are compared to the experiments in terms of high-cycle fatigue resistance and crack initiation angle.
Original languageEnglish
Pages (from-to)159-175
Number of pages17
JournalInternational Journal of Fatigue
Issue numberJuly, Part 1
Publication statusPublished - 1 Jul 2017


  • Critical plane approach
  • Electroslag remelting
  • Equivalent stress concepts
  • Multiaxial fatigue
  • Notch stress assessment

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