Pin-on-disc study of the effects of railway friction modifiers on airborne wear particles from wheel–rail contacts

Abbasi, Saeed; Olofsson, Ulf; Zhu, Yi; Sellgren, Ulf

doi:10.1016/j.triboint.2012.11.013

Cited by 35 publications

(25 citation statements)

References 13 publications

(15 reference statements)

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“…However, the laboratory results presented by Sundh et al (2009), Abbasi et al (2011Abbasi et al ( , 2012bAbbasi et al ( , 2013, and Olofsson (2010) indicate that UFPs are also generated by wear processes involving rail, wheel, and braking materials. They reported that the particle concentration in coarse, fine and ultrafine regions are dependent on the contact conditions of mating surfaces (i.e sliding velocity, contact pressure, temperature lubricant and material properties).…”

Section: Discussionmentioning

confidence: 99%

Particle Emissions From Rail Traffic: A Literature Review

Abbasi

Jansson

Sellgren

et al. 2013

Critical Reviews in Environmental Science and Technology

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Particle emissions are a drawback of rail transport. This work is a comprehensive presentation of recent research into particle emissions from rail vehicles. Both exhaust and non-exhaust particle emissions are considered when examining particle characteristics such as PM 10 , and PM 2.5 concentration levels, size, morphology, composition, as well as adverse health effects, current legislation, and available and proposed solutions for reducing such emissions. High concentration levels in enclosed rail traffic environments are reported and some toxic effects of the particles. We find that only a few limited studies have examined the adverse health effects of non-exhaust particle emissions and that no relevant legislation exists. Thus further research in this area is warranted.

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Section: Discussionmentioning

confidence: 99%

Particle Emissions From Rail Traffic: A Literature Review

Abbasi

Jansson

Sellgren

et al. 2013

Critical Reviews in Environmental Science and Technology

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“…These particles can be found in a higher concentration when the sliding velocity of the test run was increased. Abbasi et al [29] investigated friction modifiers' effects on airborne particles characteristics generated in wheel-rail contacts in laboratory conditions. The same test set up as Sundh and Olofsson [27] was used with the addition of an aerosol instrument that could measure particles down to 10 nm (SMPS).…”

Section: Particle Measurements From Laboratory Experimentsmentioning

confidence: 99%

“…These data represent the size distribution of particles in the 10 < dp < 540 nm interval recorded using an SMPS. [29] . These data represent the size distribution of particles in the 10 < dp < 540 nm interval recorded using an SMPS [29].…”

Section: Particle Measurements From Laboratory Experimentsmentioning

confidence: 99%

“…[29] . These data represent the size distribution of particles in the 10 < dp < 540 nm interval recorded using an SMPS [29]. .…”

Section: Particle Measurements From Laboratory Experimentsmentioning

confidence: 99%

“…Typical particle measurement for a lubricated wheel-rail contact (biodegradable rail grease): the load applied on the round-head pin is 40 N and the sliding velocity is 0.1 m s -1 . These data represent the size distribution of particles in the 10 < dp < 540 nm diameter interval recorded using an SMPS [29].…”

Section: Particle Measurements From Laboratory Experimentsmentioning

confidence: 99%

See 2 more Smart Citations

Tribology of the wheel–rail contact – aspects of wear, particle emission and adhesion

Olofsson

Zhu

Abbasi

et al. 2013

Vehicle System Dynamics

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The wheel-rail contact is a safety critical interface. Wear, particle emission and adhesion are all wheelrail contact phenomena and are discussed here. All three phenomena are material and system parameters and are linked together. Different countermeasures to one phenomenon such as adhesion enhancement with a friction modifier can increase the wear in the contacting bodies. The wear of railway wheel and rail are linked to the number of airborne particles generated, but the exact number and size distribution of the aerosols is unknown. The main objective of this study is to review recent work in this field and to discuss future trends.

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Effect of the Sliding Velocity on the Size and Amount of Airborne Wear Particles Generated from Dry Sliding Wheel–Rail Contacts

et al. 2016

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A set of frictional experiments have been conducted on a pin-on-disk apparatus to investigate the effect of the sliding velocity on airborne wear particles generated from dry sliding wheel-rail contacts. The size and the amount of generated particles were acquired by using particle counter instruments during the whole test period. After the completion of tests, the morphology and chemical compositions of pin worn surfaces and collected particles were analyzed by using scanning electron microscopy combined with an energy-dispersive X-ray analysis system. The results show that the total particle number concentration increases dramatically with an increased sliding velocity from 0.1 to 3.4 m/s. Moreover, the fine and ultrafine particles (\1 lm) dominates the particle generation mode in the case of a high sliding velocity (1.2 and 3.4 m/s). The contact temperature variation is observed to be closely related to the size mode of the particle generation. In addition, the sliding velocity is found to influence the active wear. Correspondingly, an oxidative wear is identified as the predominant wear mechanisms for cases with high sliding velocities (1.2 and 3.4 m/s). This produces a substantial number of iron oxide-containing particles (\1 lm) and reduces the wear rate to a relative low level (the wear rate for a 3.4 m/s sliding velocity is 4.5 % of that for a 0.4 m/s sliding velocity).

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Pin-on-disc study of the effects of railway friction modifiers on airborne wear particles from wheel–rail contacts

Cited by 35 publications

References 13 publications

Particle Emissions From Rail Traffic: A Literature Review

Particle Emissions From Rail Traffic: A Literature Review

Tribology of the wheel–rail contact – aspects of wear, particle emission and adhesion

Effect of the Sliding Velocity on the Size and Amount of Airborne Wear Particles Generated from Dry Sliding Wheel–Rail Contacts

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