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Peterson, Gregory
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document
Failure of a low rail system in a curved railway track subject to long term rail-wheel interactive wear
Abstract
This paper investigated the failure of a rail that had been in service for approximately 25 years inTasmania, Australia. A segment of the rail was taken from the site on a curved railway track. From itsservice history, it was found that the maximum train speed over that period was around 35km/h.However, approximately one third of the movements were at a speed less than 20km/h due to the factthat the rail was located on the steepest section of the line. Visual examination on the rail samplerevealed that the rail had experienced mixed traffic conditions during the service history.Mushrooming shaped plastic flow occurred in the railhead. The chemical composition of the rail wasanalysed using the optical emission spectroscopy method. Metallurgical observation on the rail sampleand a hardness test were conducted, aiming to investigate the root cause of the failure. The aim of thisstudy was to conduct the failure analysis of the rail and to provide knowledge regarding the selectionof a sustainable type of rail for this application.