dc.identifier.uri |
http://dx.doi.org/10.15488/14646 |
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dc.identifier.uri |
https://www.repo.uni-hannover.de/handle/123456789/14764 |
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dc.contributor.author |
Liu, H. C.
|
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dc.contributor.author |
Pape, F.
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dc.contributor.author |
Zhao, Y.
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dc.contributor.author |
Ellersiek, L.
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dc.contributor.author |
Denkena, B.
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dc.contributor.author |
Poll, G.
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dc.date.accessioned |
2023-09-01T05:45:19Z |
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dc.date.available |
2023-09-01T05:45:19Z |
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dc.date.issued |
2023 |
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dc.identifier.citation |
Liu, H.C.; Pape, F.; Zhao, Y.; Ellersiek, L.; Denkena, B. et al.: On the Elastohydrodynamic Film-Forming Properties of Metalworking Fluids and Oil-in-Water Emulsions. In: Tribology Letters 71 (2023), Nr. 1, 10. DOI: https://doi.org/10.1007/s11249-022-01684-2 |
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dc.description.abstract |
Oil-in-water (O/W) emulsions are water-based lubricants and used as fire-resistant hydraulic fluids and metalworking fluids (MWFs) in industry. The (elasto-)hydrodynamic film-forming properties of O/W emulsions have been studied extensively in literature. Typical elastohydrodynamic lubrication (EHL) behaviors are revealed at low rolling speeds followed by a starved EHL regime at elevated speeds. These emulsions are self-prepared and mostly stable only for a limited time ranging from hours to several days. By contrast, the film-forming behavior of water-miscible commercial MWFs (long-term stable O/W emulsions) has rarely been reported. This restricts the understanding of the lubrication status of many tribological interfaces in manufacturing processes, e.g., the chip-tool contact in cutting. In this work, the (elasto-)hydrodynamic film-forming property of two commercial MWFs is investigated by measuring the film thickness on two ball-on-disc test rigs using different optical interferometry techniques. For comparison, two self-prepared simple O/W emulsions with known formulation have also been investigated. Experimental results from the two test rigs agree well and show that the two self-prepared emulsions have typical EHL behaviors as reported in literature. However, for the two commercial MWFs, there is almost no (elasto-)hydrodynamic film-forming ability over the whole range of speeds used in this study. This could be explained by the cleaning and re-emulsification effects of the MWFs. The lubrication mechanism of the two MWFs is mainly boundary lubrication rather than hydrodynamic lubrication. Graphical Abstract: [Figure not available: see fulltext.]. |
eng |
dc.language.iso |
eng |
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dc.publisher |
Cham : Springer International Publishing |
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dc.relation.ispartofseries |
Tribology Letters 71 (2023), Nr. 1 |
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dc.rights |
CC BY 4.0 Unported |
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dc.rights.uri |
https://creativecommons.org/licenses/by/4.0 |
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dc.subject |
Film thickness |
eng |
dc.subject |
Lubrication mechanism |
eng |
dc.subject |
Metalworking fluid |
eng |
dc.subject |
Oil-in-water emulsion |
eng |
dc.subject.ddc |
670 | Industrielle und handwerkliche Fertigung
|
|
dc.title |
On the Elastohydrodynamic Film-Forming Properties of Metalworking Fluids and Oil-in-Water Emulsions |
eng |
dc.type |
Article |
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dc.type |
Text |
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dc.relation.essn |
1573-2711 |
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dc.relation.issn |
1023-8883 |
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dc.relation.doi |
https://doi.org/10.1007/s11249-022-01684-2 |
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dc.bibliographicCitation.issue |
1 |
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dc.bibliographicCitation.volume |
71 |
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dc.bibliographicCitation.firstPage |
10 |
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dc.description.version |
publishedVersion |
eng |
tib.accessRights |
frei zug�nglich |
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dc.bibliographicCitation.articleNumber |
10 |
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