Susceptibility of pearlitic rail grades to thermal white etching layer formation

Maha Messaadi, Michael Steenbergen

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

One of the most critical issues in railway engineering is the rail lifetime optimization. In track, rails suffer from various degradation forms like the head checks, squats and studs. The white etching layer (WEL) is considered as a primary stage of damage. The WEL usually appears as a metallurgical change due to the severe loading in the rail running band. This work addresses their generation based on the wheel-rail contact together with a metallurgical analysis. Influences of microstructure and stress on the austenite transformation kinetic are simulated. Consequently, the isothermal austenization diagrams for R260Mn, R350HT and R370CrHT grades under stress are discussed. It turns out that the austenitic transformation is possible within a comparable time to the wheel-rail contact duration.

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/Delft Cluster
Pages734-744
Number of pages11
ISBN (Electronic)9789461869630
Publication statusPublished - 2018
Event11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2018 - Delft, Netherlands
Duration: 24 Sep 201827 Sep 2018

Conference

Conference11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2018
CountryNetherlands
CityDelft
Period24/09/1827/09/18

Keywords

  • Heat treated grades
  • Isothermal transformation
  • Shifting time transformation under stress.
  • Wheel-rail contact
  • White etching layer (WEL)

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