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Normal Load and Counter Body Size Influence the Initiation of Microstructural Discontinuities in Copper during Sliding

Ruebeling, F. 1; Xu, Y.; Richter, G.; Dini, D.; Gumbsch, P. 1; Greiner, C. ORCID iD icon 1
1 Institut für Angewandte Materialien (IAM), Karlsruher Institut für Technologie (KIT)

Abstract:

Near the interface of two contacting metallic bodies in relative motion, the microstructure changes. This modified microstructure leads to changes in material properties and thereby influences the tribological behavior of the entire contact. Tribological properties such as the friction coefficient and wear rate are controlled by the microstructure, while the elementary mechanisms for microstructural changes are not sufficiently understood. In this paper, the influence of the normal load and the size of the counter body on the initiation of a tribologically induced microstructure in copper after a single sliding pass is revealed. A systematic variation in the normal load and sphere diameter resulted in maximum Hertzian contact pressures between 530 MPa and 1953 MPa. Scanning electron microscopy, focused ion beam, and transmission electron microscopy were used to probe the subsurface deformation. Irrespective of the normal load and the sphere diameter, a sharp line-like feature consisting of dislocations, the so-called dislocation trace line, was identified in the subsurface area at depths between 100 nm and 400 nm. For normal loads below 6.75 N, dislocation features are formed below this line. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000129863/pub
Veröffentlicht am 27.12.2022
Postprint §
DOI: 10.5445/IR/1000129863
Veröffentlicht am 05.07.2021
Originalveröffentlichung
DOI: 10.1021/acsami.0c19736
Scopus
Zitationen: 21
Web of Science
Zitationen: 20
Dimensions
Zitationen: 24
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Computational Materials Science (IAM-CMS)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 27.01.2021
Sprache Englisch
Identifikator ISSN: 1944-8244, 1944-8252
KITopen-ID: 1000129863
Erschienen in ACS applied materials & interfaces
Verlag American Chemical Society (ACS)
Band 13
Heft 3
Seiten 4750-4760
Vorab online veröffentlicht am 14.01.2021
Nachgewiesen in Dimensions
Web of Science
Scopus
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