Load direction-dependent influence of forming-induced initial damage on the fatigue performance of 16MnCrS5 steel

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dc.contributor.authorMöhring, Kerstin
dc.contributor.authorWalther, Frank
dc.date.accessioned2020-07-03T08:45:00Z
dc.date.available2020-07-03T08:45:00Z
dc.date.issued2020-06-12
dc.description.abstractForming processes influence the mechanical properties of manufactured workpieces in general and by means of forming-induced initial damage in particular. The effect of the latter on performance capability is the underlying research aspect for the investigations conducted. In order to address this aspect, fatigue tests under compressive, tensile and compressive-tensile loads were set-up with discrete block-by-block increased amplitudes and constant amplitudes, and performed up to fracture or distinct lifetimes. Aiming at the correlation of the macroscale mechanical testing results at the mesoscale, intensive metallographic investigations of cross-sections using the microscopical methods of secondary electron analysis, energy dispersive spectroscopy and electron backscatter diffraction were performed. Thereby, the correlation of forming-induced initial damage and fatigue performance was determined, the relevance of compressive loads for the cyclic damage evolution was shown, and material anisotropy under compressive loads was indicated. Finally, the need was addressed to perform further investigations regarding crack propagations and crack arrest investigations in order to clarify the mechanism by which initial damage affects cyclic damage evolution. The relevance of the principal stress axis relative to the extrusion direction was emphasized and used as the basis of an argument for investigations under load paths with different stress directions.en
dc.identifier.urihttp://hdl.handle.net/2003/39193
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-21111
dc.language.isoende
dc.relation.ispartofseriesMaterials;Vol .13. 2020, 12, 2680-1 -2680-19
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectFatigue performanceen
dc.subjectAnisotropyen
dc.subjectUniaxial load athsen
dc.subjectPre-deformationen
dc.subjectCold forward rod extrusionen
dc.subjectInitial ductile damageen
dc.subjectCase hardening steel 16MnCrS5en
dc.subjectUnder eutectoid ferrite–pearliteen
dc.subject.ddc660
dc.subject.rswkMaterialermüdungde
dc.subject.rswkAnisotropiede
dc.subject.rswkStrangpressende
dc.subject.rswkEinsatzhärtende
dc.titleLoad direction-dependent influence of forming-induced initial damage on the fatigue performance of 16MnCrS5 steelen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationMaterials. Vol.13. 2020, 12, 2680-1 - 2680-19de
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.3390/ma13122680de

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