Tribological behaviour of laser cladded rail under rolling contact test

Taposh Roy, Ralph Abrahams, Quan Lai, Peter Mutton, Mehdi Soodi, Anna Paradowska, Wenyi Yan

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Rolling contact fatigue (RCF), a pervasive and insidious problem on all types of railway systems, dominates the cause of maintenance and replacement on heavy-haul rail lines. It also plays a significant role in economic and safety challenge for commuter and metro lines. Intensive research around the world has been taken to improve RCF by introducing different surface modification techniques. Laser cladding has attracted attention because of its advanced and more efficient repairing technique. In this present investigation, influence of laser cladding on wear and RCF of a premium hypereutectoid rail steel, currently used in Australian heavy haul railways, has been studied under a roller-on-disc test rig in laboratory conditions. Rolling test was carried out using a roller made of heat treated harden steel with laser cladded and un-cladded rail steel discs. Micro-hardness of the roller was 820-850 HV5 to minimize plastic deformation and wear of the roller. Considering the real scenario of rail-wheel contacts, tests were run under partial sliding and rolling motion. The maximum contact pressure was similar to that experienced in rail due to rail-wheel contact. Wear resistance of laser cladded specimen was found to be significantly improved compared to non-cladded rail steel.

Original languageEnglish
Title of host publicationICRT 2017
Subtitle of host publicationRailway Development, Operations, and Maintenance - Proceedings of the First International Conference on Rail Transportation 2017
EditorsWanming Zhai, Kelvin C. P. Wang
Place of PublicationReston VA USA
PublisherAmerican Society of Civil Engineers
Pages445-451
Number of pages7
ISBN (Electronic)9780784481257
Publication statusPublished - 1 Jan 2018
EventInternational Conference on Rail Transportation 2017: Railway Development, Operations, and Maintenance - Southwest Jiaotong University, Chengdu, China
Duration: 10 Jul 201712 Jul 2017
Conference number: 1st
http://www.icrt-swjtu.org/

Conference

ConferenceInternational Conference on Rail Transportation 2017
Abbreviated titleICRT 2017
CountryChina
CityChengdu
Period10/07/1712/07/17
Internet address

Keywords

  • Laser cladding
  • Rail steel
  • Roller-on-disc
  • Rolling contact fatigue
  • Wear

Cite this

Roy, T., Abrahams, R., Lai, Q., Mutton, P., Soodi, M., Paradowska, A., & Yan, W. (2018). Tribological behaviour of laser cladded rail under rolling contact test. In W. Zhai, & K. C. P. Wang (Eds.), ICRT 2017: Railway Development, Operations, and Maintenance - Proceedings of the First International Conference on Rail Transportation 2017 (pp. 445-451). Reston VA USA: American Society of Civil Engineers.