Rolling contact fatigue of three pearlitic rail steels

Beynon, John H.; Garnham, J.E.; Sawley, K

doi:10.1016/0043-1648(95)06776-0

Cited by 85 publications

(44 citation statements)

References 8 publications

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“…It is observed from Fig. 15a that the cracks and deformation layer in the rail discs are significantly different to those in the wheel discs [28]. When the lubricants are applied to the contact surface of wheel/rail, the lubricants could enter the open cracks of wheel and rail discs.…”

Section: Discussionmentioning

confidence: 90%

Influence of Different Application of Lubricants on Wear and Pre-existing Rolling Contact Fatigue Cracks of Rail Materials

et al. 2017

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Rolling contact fatigue (RCF) of rail can be a significant problem affecting safety and maintenance. Rail materials have been optimized to reduce it, but not enough is known about how friction management products applied to the rail affect crack growth. This study presents experimental results carried out to explore the influence of different lubricants and application orders on wear and preexisting RCF cracks in rail materials. The results indicate that the types or properties of lubricants have a vital role in the wear rate and fatigue crack growth characteristics of rail materials after conditioning with 5000 dry cycles to initiate cracks. Using a different application order of two lubricants has a significant influence on the crack growth angles in the rail rollers.

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Section: Discussionmentioning

confidence: 90%

Influence of Different Application of Lubricants on Wear and Pre-existing Rolling Contact Fatigue Cracks of Rail Materials

et al. 2017

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“…The depth of cracking was seen to be about 500 µm . This is a typical kind of surface cracking observed with water lubricated rolling contact [20,21]. Clearly, crack growth deep into surface is the dominant feature of water lubricated contacts rather than the spall failure observed under oil lubrication.…”

Section: Water Lubricationmentioning

confidence: 98%

“…Lubricants are applied using a gravity drip fed system so as to maintain a constant meniscus of liquid in the inlet region. Further details of this test apparatus may be found in reference [20].…”

Section: Test Machinementioning

confidence: 99%

“…In this study failure was defined as the number of rolling cycles required to achieve a crack deep enough to trigger a pre-set alarm level on the eddy current flow detection unit. A critical depth of 400-500 µm was chosen on the basis of previous work [20][21][22] on the detectability of cracks. Tests were regularly interrupted to take replicas of the disc surface, and record the weight and disc dimensions.…”

Section: Test Proceduresmentioning

confidence: 99%

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The effects of surface defects on the fatigue of water-and oil-lubricated contacts

Gao

Dwyer-Joyce

2000

Proceedings of the Institution of Mechanical Engineers, Part J:

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A study into effects of surface defects on rolling contact fatigue of brass and rail steel has been undertaken on a twin-disc rolling-sliding test machine with both oil and water lubrication. Furrows and dents were artificially introduced into the disc surfaces, and surface micro cracks and pits were monitored by means of surface replication. The results showed that artificial dents only reduce the fatigue life of the contact with oil, but not water lubrication. With oil lubrication the fatigue failure initiates at the surface defect. However with water as a lubricant the whole of the surface undergoes cracking with the defect having no preferential effect. The possible mechanisms behind this behaviour are discussed in this paper.

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“…[4][5][6][7][8] A major method in the development of new wheel/ rail materials, especially the rail steel, is to improve the wear resistance and rolling contact fatigue (RCF) resistance through higher hardness. 9 Increasing hardness is relatively easy to achieve by adding alloying element (mainly manganese and vanadium) and applying heat treatment. 10 Generally, many engineers prefer to prolong the rail life by sacrificing the wheel life.…”

Section: Introductionmentioning

confidence: 99%

Effects of rail materials and axle loads on the wear behavior of wheel/rail steels

Liu

Jiang

Chen

et al. 2016

Advances in Mechanical Engineering

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Four kinds of rail steels were tested to investigate the wear behaviors of wheel-rail materials under three kinds of axle loads. Results indicate that the increase in axle load not only significantly enlarges the wear loss but also enlarges the depth and the length of the fatigue cracks. However, with the decreases in the hardness ratios, some ripples are exhibited on the surface, and the wear surfaces become much rougher; the subsurface analyses deliver the presence of extremely rough surface, and the deformation depths are irregular. The relationship between the total wear loss of the wheel/rail system and the hardness ratio indicates that the hardness ratio of wheel/rail steels has slight impact on the total wear loss at a low axle load; however, the decrease in the hardness ratio enlarges the total wear loss significantly at a high axle load. In summary, a quenched rail should be chosen for the heavy-haul railway, and the hardness of the wheel steel should be raised to a degree close to the rail. However, a hot rolled rail is much suitable for the high-speed railway, and the wheel hardness should be smaller than the rail.

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Rolling contact fatigue of three pearlitic rail steels

Cited by 85 publications

References 8 publications

Influence of Different Application of Lubricants on Wear and Pre-existing Rolling Contact Fatigue Cracks of Rail Materials

Influence of Different Application of Lubricants on Wear and Pre-existing Rolling Contact Fatigue Cracks of Rail Materials

The effects of surface defects on the fatigue of water-and oil-lubricated contacts

Effects of rail materials and axle loads on the wear behavior of wheel/rail steels

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