Relocatable 3-D surface mapping quantifies asperity polishing and limiting oil film thickness
Autor: | D R Eastham, J M Conway-Jones, D R Bury |
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Rok vydání: | 1992 |
Předmět: |
Materials science
Acoustics and Ultrasonics Mineralogy Polishing engineering.material Tribology Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dimple engineering Projected area Cast iron Graphite Composite material Crankpin Asperity (materials science) |
Zdroj: | Journal of Physics D: Applied Physics. 25:A279-A284 |
ISSN: | 1361-6463 0022-3727 |
DOI: | 10.1088/0022-3727/25/1a/042 |
Popis: | By using an enhanced system to measure surfaces in three dimensions it has been possible to compare topographic data from the same location during the bedding-in of automotive power train tribological surfaces. In addition, it has been demonstrated that AlSn12Si4Cu2 crankpin bearings have the ability to polish asperities from nodular cast iron crankshafts. There is also evidence of erosion of the graphite from the surface of the cast iron leaving shallow dimples which in conventional 2D analysis would have been interpreted as scores in the surface. The limiting minimum oil-film thickness can be related to a characteristic height of the asperities (lambda ratio) at which the `bearing area' is 0.13% of the projected area (3sigma). |
Databáze: | OpenAIRE |
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