Corrosion induced fatigue failure of railway wheels

Ren, Xuechong; Wu, Fei; Xiao, Feng; Jiang, Bo

doi:10.1016/j.engfailanal.2015.06.009

Cited by 20 publications

(2 citation statements)

References 18 publications

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“…[7][8][9][10][11] Furthermore, corrosion occurring due to the environmental influences on the rail wheels in service can also act as crack initiation sites. [12][13][14] Initiated at non-metallic inclusions or pits creating spalling along the tread surface, 15 the formation of oxides changes mechanical properties such as strength, plasticity, and wear resistance. 16 In addition, corrosion pits act as a stress concentration factor.…”

Section: Introductionmentioning

confidence: 99%

Influence of the evolution of near-surface rail wheel microstructure on crack initiation by micro-bending investigations

Freisinger

Trausmuth

Hahn

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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Severe mechanical and thermal loadings, as well as the corrosive environment change the near-surface microstructure of rail wheels during service. Resulting severely plastically deformed (SPD) and corrosion affected microstructures are prone to influence crack initiation along the wheel tread. To evaluate the crack initiation and fracture behaviour, the in-situ micro-bending method is first applied on rail wheel samples from field within this work. Results reveal detailed insights in material behaviour of SPD microstructures, where the conducted micro-bending investigations point out predominant plastic behaviour without cracks initiated at the artificial notch of the micro-cantilevers during bending. In contrast, micro-bending investigations in microstructural regions with increased oxygen and silicon composition show crack initiation, fracture, and low maximum stress levels (approximately one seventh of the SPD microstructure). The presented study underlines the increased risk of crack initiation in corrosion affected regions by a novel testing method in this field with high spatial resolution and acknowledge the importance of periodic reprofiling of the rail wheels in service.

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Section: Introductionmentioning

confidence: 99%

Influence of the evolution of near-surface rail wheel microstructure on crack initiation by micro-bending investigations

Freisinger

Trausmuth

Hahn

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…It is well-known that under service conditions, the stress and strain concentration effects of corrosion pits can make them act as sites for fatigue crack initiation and a consequent reduction in service lifetimes, compared to where pits are absent. [1][2][3][4][5] Cases of catastrophic fatigue failures that resulted from pre-pitting have been reported in aircraft components, [6][7][8] rail wheels, 9,10 steam turbine blades, 11,12 oil and gas pipeline, 13 and automotive components. 14,15 In most of these cases, failure lifetimes were observed to be significantly less than the designed service lifetimes.…”

Section: Introductionmentioning

confidence: 99%

The influence of corrosion pit–pit spacing on the pit‐to‐crack transition and fatigue lifetime

Fatoba

Akid

2022

Fatigue Fract Eng Mat Struct

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The influence of separation distance between pre-induced corrosion pits on both crack initiation and fatigue lifetimes is studied in an air environment by testing specimens containing pit pairs in the low-stress, high cycle fatigue regime. The results of these tests are compared with equivalent tests with samples containing similar sized single pit. Within the scope of pit sizes and separation distances investigated, when the separation distance is below a threshold, decreasing the separation distance between pits leads to earlier onset of crack initiation and decreased fatigue lifetimes; this threshold being dependent on the applied stress and relative pit sizes. When the separation distance is above this threshold, multiple pits tend to behave independently of each other. The implication of the results from the viewpoint of structural integrity assessment of components containing flaws such as corrosion pits in close proximity is discussed.

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