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  4. Densification of nanoporous metals during nanoindentation: The role of structural and mechanical properties
 
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Densification of nanoporous metals during nanoindentation: The role of structural and mechanical properties

Citation Link: https://doi.org/10.15480/882.4969
Publikationstyp
Journal Article
Date Issued
2023
Sprache
English
Author(s)
Huber, Norbert  orcid-logo
Werkstoffphysik und -technologie M-22  
Ryl, Ilona  
Wu, Theodore Yao-tsu  
Hablitzel, Murilo P.  
Zandersons, Birthe  
Werkstoffphysik und -technologie M-22  
Richert, Claudia  
Lilleodden, Erica  
Keramische Hochleistungswerkstoffe M-9  
Institut
Keramische Hochleistungswerkstoffe M-9  
Werkstoffphysik und -technologie M-22  
TORE-DOI
10.15480/882.4969
TORE-URI
http://hdl.handle.net/11420/14611
Journal
Journal of materials research  
Volume
38
Start Page
853
End Page
866
Citation
Journal of Materials Research 38: 853-866 (2023)
Publisher DOI
10.1557/s43578-022-00870-1
Scopus ID
2-s2.0-85145554732
The analysis of the densification behavior of nanoporous metals in nanoindentation is challenging in simulations and experiments. A deeper understanding of the densification behavior provides valuable information about the different deformation mechanisms in nanoindentation and compression experiments. The developed two-scale model allows for predicting the densification field for variable microstructure and elastic–plastic behavior. It could be shown that the penetration depth of the densification field is mainly controlled by the ratio of the macroscopic work hardening rate to yield stress. The shape as well as the value at characteristic isolines of densification depend mainly on the macroscopic plastic response of the nanoporous material. This could be confirmed by nanoindentation experiments, where the densification under the indenter was measured for ligament sizes from 35 to 150 nm. Although the depth of the densification field was underpredicted by the simulations, the experiments confirmed the predicted trends. Graphical abstract: [Figure not available: see fulltext.]
Subjects
Densification
Finite element simulation
Image processing
Nanoindentation
Nanoporous metal
DDC Class
600: Technik
Funding(s)
SFB 986: Teilprojekt B04 - Mikromechanisches Materialverhalten hierarchischer Werkstoffe  
SFB 986: Teilprojekt B08 - Mikromechanisch-elektrochemische Kopplung von nanostrukturierten Festkörpern beschichtet mit leitfähigem Polymer  
SFB 986: Teilprojekt B02 - Feste und leichte Hybridwerkstoffe auf Basis nanoporöser Metalle  
Lizenz
https://creativecommons.org/licenses/by/4.0/
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