Wear behavior of a low metallic friction material dry sliding against a cast iron disc: Role of the heat-treatment of the disc

Straffelini, Giovanni; Verma, Piyush; Metinöz, Ibrahim; Ciudin, Rodica; Perricone, Guido; Gialanella, Stefano

doi:10.1016/j.wear.2015.11.020

Cited by 45 publications

(30 citation statements)

References 17 publications

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“…The approach is particularly suited to study the relationships existing among wear mechanisms and such parameters like contact pressure, sliding velocity, environmental conditions [1,2]. Several studies report on the PoD results, concerning investigations on materials for vehicular brake systems for different transportation fields, like road vehicles [3][4][5][6][7] and trains [8,9]. As automotive brakes are concerned, pads are made of friction materials, comprising a large number of organic and inorganic components, pressed against a rotating disc, typically made of pearlitic cast iron [10].…”

Section: Introductionmentioning

confidence: 99%

“…Dynamometer and road tests are mandatory to obtain design-oriented information and for product certification. However, plain PoD testing is very useful to obtain focused information on the wear mechanisms and on their role on the tribological behaviour of real systems [6,7,[11][12][13][14]. Moreover, considering the complexity of the formulation of friction materials for brake pads, it is paramount to have a reliable selection tool for the development of novel compositions [10,15].…”

Section: Introductionmentioning

confidence: 99%

“…Metallic fibres and hard particles typically act as primary plateaus against which the wear fragments accumulate to form the secondary plateaus. Therefore, wear fragments originate either from a direct wearing out of the friction material and tribo-oxidation of the counterface cast iron or from the damage of the friction layer that forms in between the two mating surfaces [7,12,18,19]. The compactness of the secondary plateaus present in the friction layer is strongly determined by the pin-disc contact temperature during sliding [6,7,12,17,20].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, wear fragments originate either from a direct wearing out of the friction material and tribo-oxidation of the counterface cast iron or from the damage of the friction layer that forms in between the two mating surfaces [7,12,18,19]. The compactness of the secondary plateaus present in the friction layer is strongly determined by the pin-disc contact temperature during sliding [6,7,12,17,20]. As shown by Stott and coworkers [21,22], wear debris may sinter together to form compact and dense layers under the effect of the high local compressive pressures.…”

Section: Introductionmentioning

confidence: 99%

“…Of course, the compactness of the secondary plateaus increases with temperature. Therefore, an evaluation of the contact temperature is paramount to understand and to explain the main wear mechanisms [5,7,20]. In this regard, it has to be noticed that the local temperature at the friction plateaus, where sliding is really confined, is higher than the average surface contact temperature (or ''bulk'' temperature according to the nomenclature proposed by Ashby et al [23]).…”

Section: Introductionmentioning

confidence: 99%

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Pin-on-Disc Testing of Low-Metallic Friction Material Sliding Against HVOF Coated Cast Iron: Modelling of the Contact Temperature Evolution

2017

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Pin-on-disc (PoD) testing is widely used to investigate the sliding behaviour of materials and relevant wear mechanisms under different tribological conditions. The approach has been also profitably applied to the characterization of materials for brake systems to obtain specific information on the wear mechanisms. In the present study, the transient thermal analysis of a pin made with a friction material dry sliding against HVOF coated and uncoated pearlitic cast iron disc in a PoD apparatus was investigated by means of a finite element analysis together with experimental measurements. The aim of the investigation was to model the surface contact temperature in this sliding system to highlight the role of the different surface conditions, i.e., coated and uncoated, on the evolution of the pin and disc temperatures during sliding. In addition, we propose a simplified analytical equation for estimating the average temperature rise in the contact region during sliding, by extending the Kennedy approach in order to be able to provide a quick evaluation of the contact temperature for this kind of couplings, what is very helpful when characterizing a large number of systems in different contact conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pin-on-Disc Testing of Low-Metallic Friction Material Sliding Against HVOF Coated Cast Iron: Modelling of the Contact Temperature Evolution

2017

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Effects of plasma nitriding and nitrocarburizing thermochemical treatments and surface texture on surface damage evolution of hot stamping punches

Castanhera

Diniz

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2021

Int J Adv Manuf Technol

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Sliding Behaviour of Friction Material Against Cermet Coatings: Pin-on-Disc Study of the Running-in Stage

et al. 2018

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Running-in is the initial stage during which a tribological system reaches a steady state condition. In this study, the running-in behavior of a commercial brake friction material, pin-on-disc tested under dry sliding conditions has been investigated to understand the role of different surface finishing of hard coatings. These coatings were deposited onto the cast iron counterface disc and then mechanically polished to achieve set values of average roughness, Ra, and roughness skewness, Rsk . The tribological data were modeled using an exponential relation for the wear rate, according to a literature approach. The model parameters were related to the above disc surface roughness parameters. The results were interpreted in terms of the main wear mechanisms, that determine the formation of the friction layers on the pins as well as discs wear tracks. Of particular relevance is the finding that a negatively-skewed surface roughness is fundamental to achieve the best running-in performances. The beneficial effects coming from this surface treatment derive from the reduction in abrasion and from improved dynamics in the formation of the friction layer, with particular regard to those parts (secondary plateaus) made of compacted wear debris.

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Wear behavior of a low metallic friction material dry sliding against a cast iron disc: Role of the heat-treatment of the disc

Cited by 45 publications

References 17 publications

Pin-on-Disc Testing of Low-Metallic Friction Material Sliding Against HVOF Coated Cast Iron: Modelling of the Contact Temperature Evolution

Pin-on-Disc Testing of Low-Metallic Friction Material Sliding Against HVOF Coated Cast Iron: Modelling of the Contact Temperature Evolution

Effects of plasma nitriding and nitrocarburizing thermochemical treatments and surface texture on surface damage evolution of hot stamping punches

Sliding Behaviour of Friction Material Against Cermet Coatings: Pin-on-Disc Study of the Running-in Stage

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