Rail rolling contact fatigue formation and evolution with surface defects

Zhang, S.Y.; Spiryagin, Maksym; Ding, Haohao; Wu, Qing; Guo, Jun; Liu, Q.Y.; Wang, W.J.

doi:10.1016/j.ijfatigue.2022.106762

Cited by 54 publications

(6 citation statements)

References 25 publications

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“…During the wear tests at room temperature, the grease lubricant was dripped using a needle tube, while the solid lubricant was applied by hands. The density, kinematic viscosity, water content, and pour point of grease lubricant produced by Tianjin Qihong Fine Chemical Co., Ltd., Tianjin, China, were 0.9 g/cm 3 , 135 mm 2 /s, 0%, and −40 °C, respectively. It was composed of a crosslinker, basis grease, and an anti-wear agent.…”

Section: Methodsmentioning

confidence: 99%

“…With the rapid development of rail transport, the speeds of trains are gradually increasing, which have put forward the higher requirements for the safety and stability of railway systems [1][2][3]. The daily operation and maintenance of the wheel-rail are also facing new technical challenges, especially for the heavy haul railways and urban rail systems with small curve radii.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Lubricating Conditions on Wear Performance of U77MnCrH Rail

Liang,

Wei,

et al. 2024

Metals

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With the rapid development of railway towards being high speed and having heavy load capacity, the wheel–rail wear and rolling contact fatigue in the curve section with a small radius of freight have become the key problems in urban railways, which need to be solved urgently. The aims of this study were to compare the wear resistance with three different lubricating conditions on wheel–rail wear based on the wheel–rail rolling contact simulation tests. The wear loss, microhardness, and microstructure of the contacted surface of the rail were detected systematically. The results showed that the wear rates of rail were reduced by 71% for grease lubrication and 55% for solid lubrication, compared to those without lubrication. At the same time, the thickness of plastic deformation layer of rail samples were about 167 μm for the dry state, 138 μm for the solid lubrication state, and 128 μm for the oil lubrication state, respectively. It indicates that the thickness of the plastic deformation layer was significantly reduced under both grease and/or solid lubricating conditions. In addition, the microstructure of the deformation layer with two kinds of lubricated states was coarser and denser than that without lubricants. The average grain size of the deformation layer was approximately 0.22 μm under dry conditions and 0.32 μm under lubricated conditions. It also indicated that the changes in lubricants did not have a significant effect on the average grain size of the deformation layer. The results of the present study could provide theoretical reference for the development and design of lubricants used as rail materials.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Lubricating Conditions on Wear Performance of U77MnCrH Rail

Liang,

Wei,

et al. 2024

Metals

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“…Одно из приложений метода синхротронной компьютерной ламинографии связано с изучением дефектов, возникших в процессе контактноусталостного нагружения [39][40][41]. Для решения этой задачи используют также и другие методы синхротронных исследований, в том числе дифракционные [42,43]. В работе [41], выполненной Nakai с соавторами, материалом исследования была подшипниковая сталь с содержанием элементов, представленным в табл.…”

Section: исследование контактно-усталостных трещинunclassified

The study of characteristics of the structure of metallic alloys using synchrotron radiation computed laminography (Research Review)

Kutkin¹,

Батаев²,

Dovzhenko³

et al. 2022

Metal Working and Material Science

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The paper contains a review of research related to the use of synchrotron radiation computed laminography in the study of the structure features of metal alloys subjected to various methods of external action. Introduction. The important role of X-rays in the field of materials research is discussed. The capabilities of standard X-ray devices equipped with X-ray tubes and modern synchrotron radiation (SR) sources with unique parameters are compared. Methods for studying flat samples. Tomography and synchrotron laminography. An informative method based on the use of synchrotron X-rays is synchrotron radiation computed tomography (SRCT), which allows obtaining cross-section images of objects by processing multiple absorption radiographs. A brief classification of five generations of tomographs is presented. The problems encountered in obtaining data from non-compact (non-isometric) samples are avoided by using the method of synchrotron radiation computed laminography (SRCL), which combines the principles of laminography with the advantages of synchrotron imaging. Currently the method is used for non-destructive testing of non-isometric objects by a number of synchrotron radiation sources (ESRF, ANKA, Spring-8). Resolution of synchrotron radiation computed laminography. The use of monochromatic radiation in realization of computed laminography method is a factor, which provides high spatial resolution down to micron and submicron scale. An equally important factor is related to the characteristics of the detector. Images with a resolution of ~100 nm were obtained using nanolaminography. Comparison of laminography and tomography methods. Augmented laminography. Augmented laminography allows improving image quality by augmenting the Fourier space analyzed by laminography with information obtained from lower resolution CT. Reconstruction performed using Augmented laminography is characterized by the absence of significant artifacts and high resolution. Implementation of the laminography method. The angle of inclination of the rotary axis θ (SRCL method) is related to the geometry of samples and is determined experimentally in each case. In order to achieve the necessary resolution, the value θ should provide an optimal average value of the intensity of the passed radiation. The energy of X-rays is calculated on the basis of material characteristics. To reconstruct images of the objects, software complexes that implement the filtered back projection method based on the Radon transform are used. Examples of laminography application for analysis of metal alloys samples. The laminography method can be used for in-situ investigations allowing real time monitoring of processes occurring under different conditions of external action, e.g. during plastic deformation of metal plates. Data on formation of pore-type defects in the process of loading of metal workpieces are interesting. Numerous examples of post-mortem studies of metal alloys for various purposes are described in the literature. Important information is obtained in the study of fatigue cracks, as well as defects arising in the process of contact-fatigue loading of materials. Conclusion. The SRCT and SRCL methods are rationally implemented at the generation 4+ synchrotron radiation source “SKIF” under construction in Novosibirsk.

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“…Wear is inevitable during the service of the wheel-rail system of a railway [1][2][3]. The wheel polygon is one of the common wear forms, which deteriorates the dynamic response of the vehicle-track system and accelerates the fatigue failure of its core components [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Initiation and evolution of wheel polygonal wear: Influence of wheel-rail hardness ratios

Wang,

Huang,

Ding

et al. 2024

Wear

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Rail rolling contact fatigue formation and evolution with surface defects

Cited by 54 publications

References 25 publications

Effects of Lubricating Conditions on Wear Performance of U77MnCrH Rail

Effects of Lubricating Conditions on Wear Performance of U77MnCrH Rail

The study of characteristics of the structure of metallic alloys using synchrotron radiation computed laminography (Research Review)

Initiation and evolution of wheel polygonal wear: Influence of wheel-rail hardness ratios

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