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Influence of the cutting method on the fatigue life and crack initiation of non-oriented electrical steel sheets

  • The fatigue behavior of thin electrical steel sheets under cyclic loading is investigated in dependence on the edge surface. Therefore, four different edge conditions are compared, whereas the edge is either laser cut, shear cut, wire cut, or polished. Strain- and stress-controlled fatigue tests are performed to determine S-N curves in the low cycle regime as well as in the high cycle regime. Microstructural data is collected by non-contacting (optical) Profilometry, Nanoindentation, X-Ray Diffraction, and Electron Backscatter Diffraction to understand the differences in fatigue life by considering surface roughness, residual stresses, hardness, and microstructure. Shear cut specimens achieve the lowest fatigue life, while the other edge conditions reach relatively similar values in the LCF regime. Crack initiation is mainly intergranular in the case of defect-free edges. This tendency has a considerable influence on the observed fatigue behavior.

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Metadaten
Author:Albin GottwaltORCiD, Paul KubaschinskiORCiD, Manuela Waltz, Ulrich TetzlaffORCiD
Language:English
Document Type:Article
Year of first Publication:2023
published in (English):International Journal of Fatigue
Publisher:Elsevier
Place of publication:Oxford
ISSN:1879-3452
ISSN:0142-1123
Volume:2024
Issue:180
Pages:9
Article Number:108073
Review:peer-review
Open Access:ja
Version:published
URN:urn:nbn:de:bvb:573-46260
Related Identifier:https://doi.org/10.1016/j.ijfatigue.2023.108073
Faculties / Institutes / Organizations:Fakultät Maschinenbau
Licence (German):License Logo Creative Commons BY-NC 4.0
Release Date:2024/03/15