The steady state wear behaviour of pearlitic rail steel under dry rolling-sliding contact conditions

Tyfour, W.R.; Beynon, John H.; Kapoor, Ajay

doi:10.1016/0043-1648(94)06533-0

Cited by 161 publications

(104 citation statements)

References 13 publications

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“…Figure 4 shows the evolution of the wear rate of the rail discs. The results have been compared to tests carried out by Tyfour et al [6] in which the wear rate evolution of BS11 rail rolling against R8A wheel steel was measured using the same twin-disc machine under the same conditions as used in these tests. Figure 4 shows that there is a wide variation in the wear behavior of the rail discs.…”

Section: R260mentioning

confidence: 99%

“…This group includes the MMV reference disc, the BS11 disc [6] and the TWIP disc The hardness of each rail disc was compared against the wear rate of the wheel disc that it was tested against as shown in Figure 5. Each disc was sectioned and polished after testing and a Vickers micro-hardness case measurement was taken close to the disc surface.…”

Section: Wear Testsmentioning

confidence: 99%

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Improving rail wear and RCF performance using laser cladding

Lewis

Fretwell-Smith

Goodwin³

et al. 2016

Wear

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Section: R260mentioning

confidence: 99%

Section: Wear Testsmentioning

confidence: 99%

Improving rail wear and RCF performance using laser cladding

Lewis

Fretwell-Smith

Goodwin³

et al. 2016

Wear

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“…The phenomenon of plastic deformation accumulation, also called ratcheting, has been recognized as the dominant wear mechanism in dry rolling/sliding contact, rather than low-cycle fatigue [3]. As shown by Tyfour et al [4], there is a critical shear strain value at which the material shows steady wear behavior. Stabilized growth of short surface cracks corresponds to reaching the critical strain in deeper material layers.…”

Section: Introductionmentioning

confidence: 98%

“…Stabilized growth of short surface cracks corresponds to reaching the critical strain in deeper material layers. Tyfour et al also point out a relationship between wear and ratcheting that can reach steady state under certain conditions [4]. However, Fletcher and Beynon [5] have observed equilibrium between crack growth and wear.…”

Section: Introductionmentioning

confidence: 99%

A method for predicting ratcheting and wear in rolling contact fatigue, taking technological residual stresses into consideration

et al. 2017

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R. Halama i dr.Metoda za predviđanje plastične deformacije i trošenja kod zamora materijala zbog dodira valjanjem uzimajući u obzir tehnološka zaostala naprezanja Original scientific paper The main aim of our study is to show the influence of residual stresses on wear and surface ratcheting in the case of line rolling contact. Experiments were carried out on the innovated TUORS (Technical University of Ostrava Rolling Sliding testing machine) testing rig under free rolling and also under a slip ratio of 0,75 %. All specimens used for the experiments were made from R7T steel. A hole-drilling method and an X-ray diffraction method were applied to determine the residual stresses induced by repeated contact loading and technological residual stresses. Mazzu's semi-analytical approach, which makes use of full integration of the Armstrong-Frederick model, was used to simulate ratcheting and wear. The proposed model calibration methodology, based on an inverse approach, allows the model parameters to be determined directly from the measured wear. The results of this study confirm that the observed technological compressive residual stresses lead to lower ratcheting and subsequently also to lower wear rates. Keywords: ratcheting; residual stress; rolling contact fatigue; wear Metoda za predviđanje plastične deformacije i trošenja kod zamora materijala zbog dodira valjanjem uzimajući u obzir tehnološka zaostala naprezanjaIzvorni znanstveni rad Glavni cilj našega rada je pokazati utjecaj zaostalih naprezanja na trošenje i plastičnu deformaciju (ratcheting) površine u slučaju linijskog dodira valjanjem. Pokusi su provedeni na obnovljenoj TUORS (Technical University of Ostrava Rolling Sliding testing machine) opremi za ispitivanje kod slobodnog valjanja i također kod omjera klizanja od 0,75 %. Svi uzorci korišteni za pokuse izrađene su od čelika R7T. Metoda bušenja rupe i metoda rendgenske difrakcije primijenjene su kako bi se odredila zaostala naprezanja uzrokovana ponavljajućim dodirnim opterećenjem i tehnološki zaostalim naprezanjima. Za simulaciju plastične deformacije i trošenja primijenjen je Mazzuov polu-analitički pristup, koji koristi punu integraciju ArmstrongFrederick modela. Predložena metodologija kalibriranja modela na temelju inverznog pristupa, omogućuje određivanje parametara modela izravno iz izmjerenog trošenja. Rezultati ovog istraživanja potvrđuju da promatrana tehnološka tlačna zaostala naprezanja dovode do smanjenja plastične deformacije, stoga i do nižeg stupnja trošenja.

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“…In their study on the steady state wear of pearlitic rail steel, Tyfour et al [10] showed that the wear rate, as function of load cycles, is not constant but rather varies with number of rolling-sliding load cycles. A minimum wear rate is observed at the initial stages where, in the an other hand, a maximum but steady-state rate prevails after a certain number of rolling-sliding load cycles.…”

Section: Introductionmentioning

confidence: 98%

Predicting the Effect of Grinding Corrugated Rail Surface on the Wear Behavior of Pearlitic Rail Steel

Tyfour

2008

Tribol Lett

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Rail grinding has become an increasingly permanent way maintenance practice to tackle rail corrugation, as well as extending the rolling contact fatigue life of rails. However, and as far as material loss is concerned, such a grinding is considered as an artificial wear process added to the natural wear. The work presented in this article investigates the quantitative effect of grinding the whole deformed rail surface layer on the overall wear process of the running surface of pearlitic rail steel. Results show that if wear behavior is known as an empirical model which can predict the effect of grinding that could be obtained.

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The steady state wear behaviour of pearlitic rail steel under dry rolling-sliding contact conditions

Cited by 161 publications

References 13 publications

Improving rail wear and RCF performance using laser cladding

Improving rail wear and RCF performance using laser cladding

A method for predicting ratcheting and wear in rolling contact fatigue, taking technological residual stresses into consideration

Predicting the Effect of Grinding Corrugated Rail Surface on the Wear Behavior of Pearlitic Rail Steel

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