Surface damage on new AS60 rail caused by wheel slip

Pal, Sarvesh, Daniel, William J.T., Valente, Carlos H.G., Wilson, Andrew and Atrens, Andrej (2012) Surface damage on new AS60 rail caused by wheel slip. Engineering Failure Analysis, 22 152-165. doi:10.1016/j.engfailanal.2012.01.002


Author Pal, Sarvesh
Daniel, William J.T.
Valente, Carlos H.G.
Wilson, Andrew
Atrens, Andrej
Title Surface damage on new AS60 rail caused by wheel slip
Journal name Engineering Failure Analysis   Check publisher's open access policy
ISSN 1350-6307
1873-1961
Publication date 2012-06
Sub-type Article (original research)
DOI 10.1016/j.engfailanal.2012.01.002
Volume 22
Start page 152
End page 165
Total pages 14
Place of publication Oxford United Kingdom
Publisher Pergamon
Collection year 2013
Language eng
Abstract A metallurgical investigation was carried out of new AS60 rail samples, subjected to severe wheel slip, which caused skid marks on the rail crown, 10-18. mm wide. Sections, studied using optical and scanning electron microscopy revealed that the surface damage was a white etching layer (WEL). The WEL had a high hardness of 884. HV consistent with martensite. The microstructure was consistent with wheel slip causing severe plastic deformation of the rail surface, and the heat generated caused a transformation to austenite, which was quenched to martensite by the steel of the cold bulk rail extracting heat from the hot surface. The WEL depths in two samples were measured to be between ~230 and 310. μm. This is indicative that there was more heat available in one sample to produce a thicker martensite layer. This is attributed to more intense wheel slip in that rail.
Keyword Wheel slip
Electron microscopy
White etching layer (WEL)
Rail steel
Rolling contact fatigue
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2013 Collection
 
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Created: Sun, 10 Jun 2012, 16:17:14 EST by System User on behalf of School of Mechanical and Mining Engineering