Dry sliding of a low steel friction material against cast iron at different loads: Characterization of the friction layer and wear debris

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Alemani, MattiaBrembo S.p.A, via Europa 2, 20140 Stezzano, BG, Italy (författare)

Dry sliding of a low steel friction material against cast iron at different loads : Characterization of the friction layer and wear debris

Artikel/kapitelEngelska2017

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Elsevier,2017
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LIBRIS-ID:oai:DiVA.org:kth-210614
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210614URI
https://doi.org/10.1016/j.wear.2017.01.040DOI

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Språk:engelska
Sammanfattning på:engelska

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QC 20170703
Pin-on-disc testing was used to investigate the sliding behavior and the wear products of a low-steel friction material against a cast iron disc at different applied loads, to investigate the effect of the temperature rise induced by frictional heating. The testing rig was operated in a clean chamber with a purified incoming air flux. The outgoing flux carries the wear particles to an impactor that counted and sorted them by average diameter and weight. At increasing applied loads, corresponding to a proportional increase of the pin-disc contact temperature, the coverage of both the pin and disc surface by a friction layer was found to increase too. The relevant X-Ray diffraction patterns revealed the presence of a large amount of graphite and different compounds originating from the friction material and from the counterface disc, mainly iron oxides, as concerns this latter. After the test at the lowest investigated load, i.e., 1 kg, the disc worn surface exhibited abrasive grooves and a discontinuous friction layer mainly made of compacted iron oxide particles. After the test at higher loads, i.e., 5 and 7 kg, the disc surface was covered by a compact friction layer. As concerns the friction layer on the pins, most of the ingredients from the friction material were detected, in association with the iron oxides from the disc. These results can be interpreted in terms of the temperature stability range of the phenolic resin used as a binder of the friction material. The characterization of the collected airborne wear debris showed that the particles produced by the low temperature (i.e., low load) test were mostly equiaxed; whereas those produced by the high temperature (i.e., high loads) tests, predominantly displayed a plate-like morphology. The mechanisms of their formation in relation to the characteristics of the friction layers are illustrated and discussed.

Ämnesord och genrebeteckningar

TEKNIK OCH TEKNOLOGIER Materialteknik Annan materialteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Other Materials Engineering hsv//eng
Brake systems
Debris collection
Electron microscopy
Single particle analysis
Wear testing
X-ray diffraction

Biuppslag (personer, institutioner, konferenser, titlar ...)

Gialanella, S.Department of Industrial Engineering, University of Trento, via Sommarive 9, Povo, Trento 38123, Italy (författare)
Straffelini, G.Department of Industrial Engineering, University of Trento, via Sommarive 9, Povo, Trento 38123, Italy (författare)
Ciudin, R.Department of Industrial Engineering, University of Trento, via Sommarive 9, Povo, Trento 38123, Italy (författare)
Olofsson, Ulf,1962-KTH,Maskinkonstruktion (Inst.)(Swepub:kth)u10qpddv (författare)
Perricone, G.Brembo S.p.A, via Europa 2, 20140 Stezzano, BG, Italy (författare)
Metinoz, I.Brembo S.p.A, via Europa 2, 20140 Stezzano, BG, Italy (författare)
Brembo S.p.A, via Europa 2, 20140 Stezzano, BG, ItalyDepartment of Industrial Engineering, University of Trento, via Sommarive 9, Povo, Trento 38123, Italy (creator_code:org_t)

Sammanhörande titlar

Ingår i:Wear: Elsevier376-377, s. 1450-14590043-16481873-2577

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Av författaren/redakt...: Alemani, Mattia; Gialanella, S.; Straffelini, G.; Ciudin, R.; Olofsson, Ulf, 1 ...; Perricone, G.; visa fler...; Metinoz, I.; visa färre...

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