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  A new method for microscale cyclic crack growth characterization from notched microcantilevers and application to single crystalline tungsten and a metallic glass

Gabel, S., Merle, B., Bitzek, E., & Göken, M. (2022). A new method for microscale cyclic crack growth characterization from notched microcantilevers and application to single crystalline tungsten and a metallic glass. Journal of Materials Research. doi:10.1557/s43578-022-00618-x.

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Gabel2022_Article_ANewMethodForMicroscaleCyclicC.pdf (Publisher version), 4MB
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Gabel2022_Article_ANewMethodForMicroscaleCyclicC.pdf
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 Creators:
Gabel, Stefan1, Author           
Merle, B.1, 2, Author
Bitzek, Erik3, 4, Author           
Göken, Mathias5, Author           
Affiliations:
1Department of Materials Science & Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Institute I: General Materials Properties, Erlangen, Germany, ou_persistent22              
2Institute of Materials Engineering, University of Kassel, 34125, Kassel, Germany, ou_persistent22              
3Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863337              
4Department of Materials Science and Engineering, Institute i, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany, ou_persistent22              
5Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Materials Science and Engineering, Institute i, Martensstr. 5, 91058 Erlangen, Germany, ou_persistent22              

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 Abstract: The lifetime of most metals is limited by cyclic loads, ending in fatigue failure. The progressive growth of cracks ends up in catastrophic failure. An advanced method is presented for the determination of cyclic crack growth on the microscale using a nanoindenter, which allows the characterization of > 10,000 loading cycles. It uses focused ion beam fabricated notched microcantilevers. The method has been validated by cyclic bending metallic glass and tungsten microcantilevers. The experiments reveal a stable crack growth during the lifetime of both samples. The metallic glass shows less plasticity due to the absence of dislocations, but shows shearing caused by the deformation. The crack growth rates determined in the tests follow Paris’ power law relationship. The results are reliable, reproducible and comparable with macroscopic setups. Due to the flexibility of the method, it is suitable for the characterization of specific microstructural features, like single phases, grain boundaries or different grain orientations.

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Language(s): eng - English
 Dates: 2022-06-222022
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1557/s43578-022-00618-x
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Title: Journal of Materials Research
  Abbreviation : J. Mater. Res.
Source Genre: Journal
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Publ. Info: Pittsburgh, PA : Published for the Materials Research Society by the American Institute of Physics
Pages: 12 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0884-2914
CoNE: https://pure.mpg.de/cone/journals/resource/954925550339