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Fatigue of carburised CrNiMo steel: Testing and modelling concept
Author(s) -
Böhme Stephan André,
Vinogradov Alexei,
Biermann Horst,
Weidner Anja,
Schmiedel Alexander,
Henkel Sebastian
Publication year - 2021
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13394
Subject(s) - materials science , classification of discontinuities , fatigue testing , scanning electron microscope , fatigue limit , metallurgy , peening , structural engineering , residual stress , composite material , engineering , mathematics , mathematical analysis
In this study, a testing and modelling concept is presented, aimed at estimating the local fatigue properties of carburised CrNiMo steel, covering the fatigue limit under axial and torsional loading at various mean stresses. Aimed at predicting the bulk material properties, all specimens were ultrasonic shot‐peened prior to testing. Fractographic analyses were conducted on all specimens using scanning electron microscopy to define the type, size and chemical composition of crack initiation‐related discontinuities. An iteration of the FKM guideline is presented, relying on the external notch concept to explain the effect of large internal notches on the mean stress sensitivity.