Deformation of inclusions in rail steel due to rolling contact

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indexcodes.txt

http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/19416 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/19416 http://eprints.org/relation/isIndexCodesVersionOf http://etheses.bham.ac.uk/id/document/19416 archive 4031 disk0/00/00/32/95 2012-05-04 11:30:35 2019-01-23 09:55:58 2012-05-04 11:30:35 thesis show 0 Chard Alison Elizabeth Davies Claire University of Birmingham Deformation of inclusions in rail steel due to rolling contact unpub TN 10col_ephy Rolling contact fatigue (RCF) is a significant problem in the rail industry as it causes rapid and difficult to detect cracks. Inclusions present in the material can have an adverse effect on the RCF life of rails. This study aims to discover the impact of the loading of rail steel in service on the inclusions present within the material. The work pays particular attention to the elongation and flattening of MnS inclusions and their contribution toward rail failure using a combination of micro-hardness measurements, inclusion analysis and focused ion beam analysis. The results indicate that the inclusions present in the material are considerably elongated by the loading of the rail in service and this may contribute to spontaneous cracking or assist in crack propagation. 2012-07 2011-01 graduation eng This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. public 40 University of Birmingham School of Metallurgy and Materials m_rs epsrc 2012-07 graduation