Datum
2019Schlagwort
600 Technik 620 Ingenieurwissenschaften UltrafeinkornTitanStrangpressenErmüdung bei sehr hohen LastspielzahlenPlastische DeformationKerbwirkungBruchverhaltenMetadata
Zur Langanzeige
Aufsatz
Effect of grain size on the very high cycle fatigue behavior and notch sensitivity of titanium
Zusammenfassung
The very high-cycle fatigue performances of coarse-grained and ultrafine-grained titanium samples with different geometries at ambient temperature and various stress amplitudes were investigated. Severe plastic deformation improves monotonic strength of titanium at the cost of a loss in ductility. Ultrafine-grained titanium demonstrates a superior fatigue performance compared to that of coarse-grained counterparts in the high-cycle fatigue regime, however, suffers notch sensitivity. Furthermore, in the very high-cycle fatigue regime stress-life curves merge unexpectedly. Microstructural inhomogeneity in the ultrafine-grained titanium is expected to be the reason. Analysis of fracture surfaces reveals that the formation of fatigue slip marks is evident on the fatigued samples of both microstructural states. Ultrafine-grained titanium is more prone to the intergranular fracture.
Zitierform
In: Theoretical and Applied Fracture Mechanics Volume 104 (2019) eissn:1872-7638Zusätzliche Informationen
© This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/Zitieren
@article{doi:10.17170/kobra-202312229273,
author={Sajadifar, Seyed Vahid and Wegener, Thomas and Yapici, Guney Guven and Niendorf, Thomas},
title={Effect of grain size on the very high cycle fatigue behavior and notch sensitivity of titanium},
journal={Theoretical and Applied Fracture Mechanics},
year={2019}
}
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2023-12-22T10:23:40Z 2023-12-22T10:23:40Z 2019 doi:10.17170/kobra-202312229273 http://hdl.handle.net/123456789/15320 © This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ ultra-fine grained titanium equal channel angular extrusion/pressing very high-cycle fatigue severe plastic deformation notch sensitivity fracture morphology 600 620 Effect of grain size on the very high cycle fatigue behavior and notch sensitivity of titanium Aufsatz The very high-cycle fatigue performances of coarse-grained and ultrafine-grained titanium samples with different geometries at ambient temperature and various stress amplitudes were investigated. Severe plastic deformation improves monotonic strength of titanium at the cost of a loss in ductility. Ultrafine-grained titanium demonstrates a superior fatigue performance compared to that of coarse-grained counterparts in the high-cycle fatigue regime, however, suffers notch sensitivity. Furthermore, in the very high-cycle fatigue regime stress-life curves merge unexpectedly. Microstructural inhomogeneity in the ultrafine-grained titanium is expected to be the reason. Analysis of fracture surfaces reveals that the formation of fatigue slip marks is evident on the fatigued samples of both microstructural states. Ultrafine-grained titanium is more prone to the intergranular fracture. open access Sajadifar, Seyed Vahid Wegener, Thomas Yapici, Guney Guven Niendorf, Thomas doi:10.1016/j.tafmec.2019.102362 Ultrafeinkorn Titan Strangpressen Ermüdung bei sehr hohen Lastspielzahlen Plastische Deformation Kerbwirkung Bruchverhalten acceptedVersion eissn:1872-7638 Theoretical and Applied Fracture Mechanics Volume 104 false 102362
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