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Abstract
The effect of cyclic loading on facture surface topology in notched components made by aluminium alloys is not completely clear. Fractogra-phy and fracture mechanics can help to understand this interdependency. This paper aims to study the distribution of the fracture surface roughness of notched 2017A-T4 aluminium alloy after bending fatigue using an optical focus-variation surface measurement technique by applying the fracture zone concept. The effects of stress level at the notch root and the load ratio on fatigue crack growth and fracture surfaces are analysed. Profile and areal surface parameters of four fracture surface regions were investigated at incre-mental crack lengths of the specimens. Studies have confirmed that the surface areas associated with the main stages of fatigue phenomenon (i.e. crack initiation , crack propagation, and final rupture) have significant differences in roughness which can be explained by the different loading scenarios. Overall, fatigue fracture surfaces have smallest roughness values at the crack initiation stage and a gradual increase during the fatigue crack growth stage.
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1007/s10704-021-00579-y
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
INTERNATIONAL JOURNAL OF FRACTURE
no. 234,
pages 141 - 151,
ISSN: 0376-9429 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Macek W.: Fracture surface formation of notched 2017A-T4 aluminium alloy under bending fatigue// INTERNATIONAL JOURNAL OF FRACTURE -Vol. 234, (2022), s.141-151
- DOI:
- Digital Object Identifier (open in new tab) 10.1007/s10704-021-00579-y
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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