Experimental and numerical investigation of UIC 54 rail degradation

Belalia, A.; Kamla, Y.; Amara, M.; Méliani, M. Hadj; Azizi, Abdellah El; Azari, Z.

doi:10.1016/j.engfailanal.2019.104163

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…Presence of single defects showed no significant difference for Longitudinal Level with reference to Curvature and Track Type and for Alignment with reference to Slope and Track Type as well. This can be explained considering that the outer rail on a curve is affected by higher horizontal forces due to centrifugal acceleration, 12,40 while slope influence mostly the forces on the vertical plane. Nevertheless, the total number of isolated defects of Longitudinal Level and Alignment is very low, making difficult to analyse the complexity and variability of degradation.…”

Section: Discussionmentioning

confidence: 99%

Railway degradation behaviour analysis in narrow-gauge railways: A local-railway case study

Marchetta

Graziano

Soleimanmeigouni

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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An efficient maintenance strategy is a key factor to ensure acceptable safety levels and manage the overall costs of a railway network. So far, research focused mainly on regional and high-speed rail networks, causing a knowledge and regulation gap between standard and narrow-gauge railways networks. These networks, like the local or isolated railways, have peculiar geometric and operational characteristics that play a key role on track geometry quality degradation process. For this reason, the maintenance knowledge gained in the context of standard railways when applied to systems such as narrow-gauge railways could lead to non-optimized use of the limited resources available. Therefore, the aim of this study is to analyse how the track geometry quality degradation behaviour is influenced by the key characteristics of narrow-gauge railways through the analysis of the track geometry data of an Italian local railway, laying the foundation for optimized maintenance strategies for these systems.

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Section: Discussionmentioning

confidence: 99%

Railway degradation behaviour analysis in narrow-gauge railways: A local-railway case study

Marchetta

Graziano

Soleimanmeigouni

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…Heavy rail steel mainly refers to rail with a nominal weight of 60-70 kg/m; thus, the material requires good impact strength, hardness, and wear resistance. Because inclusions in steel can cause internal damage to heavy rail steel and fatigue damage during use, the industry has placed strict requirements on the cleanliness of heavy rail steel; in particular, the control of inclusions in steel is extremely stringent [1][2][3]. According to the literature [4], research on 1080 MPa high-strength heavy rail steel showed that the addition of rareearth elements in the steel can improve its wear resistance, corrosion resistance, strength, and other properties; thus, rare-earth heavy rail steel can be used as high-strength rail steel for applications in high-speed, heavy-haul railway transportation, as well as railway transportation with many curved sections.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Analysis of the Influence of Rare-Earth Ce on Inclusions in Heavy Rail Steel

Bai

Yang

2023

Metals

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The effect of rare-earth Ce on the evolution behaviour of inclusions in heavy rail steel was studied. The addition of Ce can significantly reduce the number and size of class A, B, D, and Ds inclusions in the heavy rail steel smelting process. According to the statistical analysis of the size of inclusions in steel, the number and size of A and B inclusions in steel tend to decrease significantly, while D and Ds inclusions disappear. Ce splits the aluminium inclusion into several small-sized inclusions and improves the morphology of the large-size aluminium inclusion, thereby making aggregation and growth difficult while facilitating easy floating and removal. Because the addition of Ce reduces the concentration of S element in steel, MnS inclusions are difficult to grow. The decrease in the number and size of core inclusions required for MnS growth leads to a corresponding decrease in the number and size of MnS inclusions. Meanwhile, the S element also easily gathers on the surface of CaO–MgO–Al2O3–SiO2–CeO inclusions, forming composite inclusions that are more easily removed, thus reducing the quantity and size of MnS inclusions.

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“…Thus, one of the main aims of the Euraxles research project [23] has become minimizing the risk of axle failure either by improving available nondestructive techniques, or by developing new ones also. The project mainly focused on ultrasonic techniques (UT) [24], which are the non-destructive techniques most widely used in the railway field [25][26][27][28][29]. In this regard, when visual testing (VT) reveals small defects on the surface, such as paint damage (peeling) or corrosion pits, magnetic particles testing (MT) and ultrasonic testing (UT) are the recommended inspection techniques, according to the adopted maintenance standard procedure [30].…”

Section: Introductionmentioning

confidence: 99%