Ratcheting performance of flashbutt welds in premium Rail steels

Chung Lun Pun, Peter Mutton, Darrien Welsby, Wenyi Yan

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The benefits of using premium pearlitic rail steels in heavy haul operations may be offset by the potential occurrence of localized degradation at flashbutt welds due to the discontinuous nature of both microstructure and mechanical properties between the heat-affected zone and the parent rail. In this study, the influence of the width of the softened zone on ratcheting behaviour of flashbutt welds has been investigated for three rail steels. The results show that both maximum ratcheting strain and maximum ratcheting strain rate can be significantly reduced for all three rail steels by narrowing the width of the softened zones. This indicates that the performance of flashbutt welds can be improved by reducing the width of the softened zones.

Original languageEnglish
Title of host publicationProceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018
EditorsAlfredo Nunez, Zili Li
PublisherTU Delft
Pages792-802
Number of pages11
ISBN (Electronic)9789461869630
Publication statusPublished - 1 Jan 2018
EventInternational Conference on Contact Mechanics and Wear of Rail/Wheel Systems 2018 - Delft, Netherlands
Duration: 24 Sep 201827 Sep 2018
Conference number: 11th

Publication series

NameProceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018

Conference

ConferenceInternational Conference on Contact Mechanics and Wear of Rail/Wheel Systems 2018
Abbreviated titleCM 2018
CountryNetherlands
CityDelft
Period24/09/1827/09/18

Keywords

  • Finite element analysis.
  • Flashbutt weld
  • Premium pearlitic rail steels
  • Ratcheting behaviour
  • Softened zone

Cite this

Pun, C. L., Mutton, P., Welsby, D., & Yan, W. (2018). Ratcheting performance of flashbutt welds in premium Rail steels. In A. Nunez, & Z. Li (Eds.), Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018 (pp. 792-802). (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018). TU Delft.
Pun, Chung Lun ; Mutton, Peter ; Welsby, Darrien ; Yan, Wenyi. / Ratcheting performance of flashbutt welds in premium Rail steels. Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. editor / Alfredo Nunez ; Zili Li. TU Delft, 2018. pp. 792-802 (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018).
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title = "Ratcheting performance of flashbutt welds in premium Rail steels",
abstract = "The benefits of using premium pearlitic rail steels in heavy haul operations may be offset by the potential occurrence of localized degradation at flashbutt welds due to the discontinuous nature of both microstructure and mechanical properties between the heat-affected zone and the parent rail. In this study, the influence of the width of the softened zone on ratcheting behaviour of flashbutt welds has been investigated for three rail steels. The results show that both maximum ratcheting strain and maximum ratcheting strain rate can be significantly reduced for all three rail steels by narrowing the width of the softened zones. This indicates that the performance of flashbutt welds can be improved by reducing the width of the softened zones.",
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Pun, CL, Mutton, P, Welsby, D & Yan, W 2018, Ratcheting performance of flashbutt welds in premium Rail steels. in A Nunez & Z Li (eds), Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018, TU Delft, pp. 792-802, International Conference on Contact Mechanics and Wear of Rail/Wheel Systems 2018, Delft, Netherlands, 24/09/18.

Ratcheting performance of flashbutt welds in premium Rail steels. / Pun, Chung Lun; Mutton, Peter; Welsby, Darrien; Yan, Wenyi.

Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. ed. / Alfredo Nunez; Zili Li. TU Delft, 2018. p. 792-802 (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018).

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

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AB - The benefits of using premium pearlitic rail steels in heavy haul operations may be offset by the potential occurrence of localized degradation at flashbutt welds due to the discontinuous nature of both microstructure and mechanical properties between the heat-affected zone and the parent rail. In this study, the influence of the width of the softened zone on ratcheting behaviour of flashbutt welds has been investigated for three rail steels. The results show that both maximum ratcheting strain and maximum ratcheting strain rate can be significantly reduced for all three rail steels by narrowing the width of the softened zones. This indicates that the performance of flashbutt welds can be improved by reducing the width of the softened zones.

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Pun CL, Mutton P, Welsby D, Yan W. Ratcheting performance of flashbutt welds in premium Rail steels. In Nunez A, Li Z, editors, Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018. TU Delft. 2018. p. 792-802. (Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018).