Tribochemical Wear of Rail Steels Lubricated with Synthetic Ester-Based Model Lubricants

Waara, Patric; Norrby, Thomas; Prakash, Braham

doi:10.1023/b:tril.0000044505.42373.0e

Cited by 23 publications

(15 citation statements)

References 7 publications

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“…The friction force observed increased with a decrease in carbon chain length of the linear compounds, which is consistent with previous reports [4][5][6][7][8]. There were very minor differences in friction response of the branched compounds and their linear counterparts.…”

Section: Effect Of Branchingsupporting

confidence: 93%

“…So far a majority of the tribological characterization studies of bio-based products have been on long chain compounds and on the effect of chain length, unsaturation and polarity on boundary lubrication. Predominantly, compounds with longer chains show lower friction and lower wear than those with shorter ones [4][5][6][7][8]. The saturated compounds show better behavior than the unsaturated ones [3,[9][10][11] and acids with a high degree of polarity exhibit improved tribological properties compared to esters whose polarity is less [3].…”

Section: Introductionmentioning

confidence: 99%

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Boundary lubrication properties of lipid-based compounds evaluated using microtribological methods

et al. 2006

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Microscale friction tests were utilized to evaluate the boundary lubrication behavior of three sets of branched compounds and their corresponding linear compounds. The performances of the compounds were compared to that of lipid-based saturated and unsaturated acids, esters and alcohols as well as to that of commercial synthetic lubricant formulations. At low concentrations ($0.5%) in paraffin oil and for the load conditions used, the branched compounds showed minor differences in friction behavior as compared to their linear counterparts. The ester compounds by comparison showed higher friction behavior than alcohols and acids.

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Section: Effect Of Branchingsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Boundary lubrication properties of lipid-based compounds evaluated using microtribological methods

et al. 2006

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“…For ground and polished surface specimens they report material loss of 0.0125/0.0174 g for 100,000 cycles. Waara et al [5], on the other hand, have described the gauge face wear rate as being in the range 0.5-3.8 nm per axle passage when conducting field tests on rails of 350 m curve radius, 22.5 tonnes axle load and the application of lubricant. Although these data have no identical units, the wear regimes were labelled in the articles as mild to catastrophic; mild to severe in the lab tests; and mild to severe in the field test.…”

Section: Wheel Wear; Presenting Figuresmentioning

confidence: 98%

An investigation to the influence of bogie direction reversal on equalizing rail vehicle wheel wear

Lari¹,

Kapoor²

2008

Wear

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“…Solid lubricants form one of the important constituent components of the basic lubricating agents such as oil. The available literature suggests that there is a variety of solid lubricants that could be added to oil to realize improved performance [7][8][9][10][11][12][13][14][15]. However, there is a continuous search for cheaper and more effective versions of solid lubricants that could be used in practice.…”

Section: Introductionmentioning

confidence: 99%

“…The mentioned shortcomings arising out of the dispersion of the solid lubricant phase in the sliding material system could be minimized or overcome effectively when the solid lubricant phase is suspended in the base lubricant since the exercise increases the probability for its more effective smearing thereby forming a lubricant film on the sliding surfaces [7][8][9][10][11][12][13][14][15]. As far as the content of the solid lubricant is concerned, the best wear response is observed when an optimum content of the phase is mixed in the base (oil) lubricant [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Influence of Suspended Talc Particles in Oil And Nature of Material Microconstituents on Sliding Wear Characteristics of Cast Iron and Zinc-based Alloy

Prasad¹

2009

Canadian Metallurgical Quarterly

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This investigation pertains to some observations on the sliding wear behaviour of a zincbased alloy and grey cast iron as influenced by the content of talc particles suspend in SAE40 oil lubricant. Tribological parameters evaluated using a pin-on-disc machine were wear rate, frictional heating and friction coefficient. The study suggests that the presence of suspended talc particles in the oil lubricant brought about improved wear response of the samples. However, the degree of improvement was strongly dependent on the talc content and even adverse effect of talc addition beyond a limit was noted. The observed wear response of the samples has been explained in terms of characteristics like compatibility, lubricating and cracking tendency of various microconstituents of the specimen materials and formation and stability of lubricant film during sliding. Characteristic features of wear surfaces, subsurface regions and debris particles enabled to further substantiate the wear response of the samples.Résumé -Cette investigation a trait à certaines observations du comportement d'usure par glissement d'un alliage à base de zinc et de fonte grise tel qu'influencé par la teneur en particules de talc suspendues dans l'huile de graissage SAE40. Les paramètres tribologiques évalués en utilisant un appareil à pointesur-disque incluaient la vitesse d'usure, le chauffage par friction et le coefficient de friction. L'étude suggère que la présence de particules de talc suspendues dans l'huile de graissage a mené à une meilleure réponse d'usure des échantillons. Cependant, le degré d'amélioration était fortement dépendant de la teneur en talc et l'on a même noté un effet indésirable d'addition de talc au-delà d'une limite. On a expliqué la réponse à l'usure observée sur les échantillons du point de vue de caractéristiques comme la compatibilité, la tendance à la lubrification et au craquelage des constituants structuraux variés de l'échantillon des matériaux et la formation et la stabilité d'un film lubrifiant lors du glissement. Les éléments caractéristiques des surfaces d'usure, les régions sous la surface et les débris de particules ont rendu possible d'établir davantage la réponse à l'usure des échantillons.

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Tribochemical Wear of Rail Steels Lubricated with Synthetic Ester-Based Model Lubricants

Cited by 23 publications

References 7 publications

Boundary lubrication properties of lipid-based compounds evaluated using microtribological methods

Boundary lubrication properties of lipid-based compounds evaluated using microtribological methods

An investigation to the influence of bogie direction reversal on equalizing rail vehicle wheel wear

Influence of Suspended Talc Particles in Oil And Nature of Material Microconstituents on Sliding Wear Characteristics of Cast Iron and Zinc-based Alloy

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