Aufsatz
A new method for microscale cyclic crack growth characterization from notched microcantilevers and application to single crystalline tungsten and a metallic glass
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.
Citation
@article{doi:10.17170/kobra-202304207859,
author={Gabel, Stefan and Merle, Benoit and Bitzek, Erik and Göken, Mathias},
title={A new method for microscale cyclic crack growth characterization from notched microcantilevers and application to single crystalline tungsten and a metallic glass},
journal={Journal of Materials Research (JMR)},
year={2022}
}
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3000 Gabel, Stefan
3010 Merle, Benoit
3010 Bitzek, Erik
3010 Göken, Mathias
4000 A new method for microscale cyclic crack growth characterization from notched microcantilevers and application to single crystalline tungsten and a metallic glass / Gabel, Stefan
4030
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5550 {{Rissausbreitung}}
5550 {{Mechanische Eigenschaft}}
5550 {{Nanostruktur}}
7136 ##0##http://hdl.handle.net/123456789/14609
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2023-04-20T14:17:48Z 2023-04-20T14:17:48Z 2022-06-22 doi:10.17170/kobra-202304207859 http://hdl.handle.net/123456789/14609 eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 620 A new method for microscale cyclic crack growth characterization from notched microcantilevers and application to single crystalline tungsten and a metallic glass Aufsatz 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. open access Gabel, Stefan Merle, Benoit Bitzek, Erik Göken, Mathias 2061-2072 doi:10.1557/s43578-022-00618-x Rissausbreitung Mechanische Eigenschaft Nanostruktur publishedVersion eissn:2044-5326 Issue 12 Journal of Materials Research (JMR) Volume 37 false </resource>
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