The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties
Thermal damage of rails can occur through brake lock-up, or traction control system failure to prevent wheel spin. In most cases the damage produced is shallow and takes the form of a “white etching layer”, usually thought to have a martensitic structure, formed as the steel is heated above its eute...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier Science Ltd
2016
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/3704/ http://eprints.uthm.edu.my/3704/1/AJ%202017%20%2894%29%20The%20potential%20for%20suppressing%20rail%20defect.pdf |
| _version_ | 1848888093171515392 |
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| author | I., David N., Fletcher H. Sanusi, Shahmir |
| author_facet | I., David N., Fletcher H. Sanusi, Shahmir |
| author_sort | I., David |
| building | UTHM Institutional Repository |
| collection | Online Access |
| description | Thermal damage of rails can occur through brake lock-up, or traction control system failure to prevent wheel spin. In most cases the damage produced is shallow and takes the form of a “white etching layer”, usually thought to have a martensitic structure, formed as the steel is heated above its eutectoid tem-perature and then rapidly cooled as the wheel moves away. In many cases such layers are benign, but there is evidence of crack initiation at their interface with the sub-surface layers of the rail in “stud” defects. The metallurgical transformation during the formation of white etching layers leads to a volume change for the steel, leaving not only a transformed microstructure, but also locked-in stress. The influence of this additional locked-in stress on development of an initiated crack is studied in this paper, and the work extended to consider how alternative materials which react differently to the thermal input may offer a means to suppress crack development through locking in beneficial rather than problematic stresses. |
| first_indexed | 2025-11-15T20:04:48Z |
| format | Article |
| id | uthm-3704 |
| institution | Universiti Tun Hussein Onn Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:04:48Z |
| publishDate | 2016 |
| publisher | Elsevier Science Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | uthm-37042021-11-21T07:57:34Z http://eprints.uthm.edu.my/3704/ The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties I., David N., Fletcher H. Sanusi, Shahmir TF Railroad engineering and operation Thermal damage of rails can occur through brake lock-up, or traction control system failure to prevent wheel spin. In most cases the damage produced is shallow and takes the form of a “white etching layer”, usually thought to have a martensitic structure, formed as the steel is heated above its eutectoid tem-perature and then rapidly cooled as the wheel moves away. In many cases such layers are benign, but there is evidence of crack initiation at their interface with the sub-surface layers of the rail in “stud” defects. The metallurgical transformation during the formation of white etching layers leads to a volume change for the steel, leaving not only a transformed microstructure, but also locked-in stress. The influence of this additional locked-in stress on development of an initiated crack is studied in this paper, and the work extended to consider how alternative materials which react differently to the thermal input may offer a means to suppress crack development through locking in beneficial rather than problematic stresses. Elsevier Science Ltd 2016 Article PeerReviewed text en http://eprints.uthm.edu.my/3704/1/AJ%202017%20%2894%29%20The%20potential%20for%20suppressing%20rail%20defect.pdf I., David and N., Fletcher and H. Sanusi, Shahmir (2016) The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties. Wear, 366-36. pp. 401-406. ISSN 0043-1648 http://dx.doi.org/10.1016/j.wear.2016.06.022 |
| spellingShingle | TF Railroad engineering and operation I., David N., Fletcher H. Sanusi, Shahmir The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties |
| title | The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties |
| title_full | The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties |
| title_fullStr | The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties |
| title_full_unstemmed | The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties |
| title_short | The potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties |
| title_sort | potential for suppressing rail defect growth through tailoring rail thermo-mechanical properties |
| topic | TF Railroad engineering and operation |
| url | http://eprints.uthm.edu.my/3704/ http://eprints.uthm.edu.my/3704/ http://eprints.uthm.edu.my/3704/1/AJ%202017%20%2894%29%20The%20potential%20for%20suppressing%20rail%20defect.pdf |