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J. Wu¹, R.H. Petrov^1,2, M. Naeimi³, Z. Li³ and J. Sietsma¹

¹Department of Materials Science and Engineering, Delft University of Technology, the Netherlands
²Department of Materials Science and Engineering, Ghent University, Belgium
³Section of Railway Engineering, Faculty of Civil Engineering and Geoscience, Delft University of Technology, the Netherlands

doi:10.4203/ccp.104.118

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J. Wu, R.H. Petrov, M. Naeimi, Z. Li, J. Sietsma, "A Microstructural Study of Rolling Contact Fatigue in Rails", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 118, 2014. doi:10.4203/ccp.104.118

Keywords: RCF, MnS inclusion, EBSD, strain concentration, crack propagation, KAM misorientation.

Summary

In this paper, microstructural features due to rolling contact fatigue in rails were studied by means of microhardness, optical microscope, and high resolution electron backscatter diffraction (EBSD). Significant strain accumulation was found not only in the rail surface but also near MnS inclusions at 680µm beneath the surface. It is shown that the extent of straining at the inclusion is comparable to the one in the rail surface. As a consequence, the MnS inclusions might alter the propagation route of rolling contact fatigue (RCF) cracks. This imposes very strong requirements for metallurgy quality control.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 118 A Microstructural Study of Rolling Contact Fatigue in Rails J. Wu¹, R.H. Petrov^1,2, M. Naeimi³, Z. Li³ and J. Sietsma¹ ¹Department of Materials Science and Engineering, Delft University of Technology, the Netherlands ²Department of Materials Science and Engineering, Ghent University, Belgium ³Section of Railway Engineering, Faculty of Civil Engineering and Geoscience, Delft University of Technology, the Netherlands doi:10.4203/ccp.104.118 purchase the full-text of this paper Full Bibliographic Reference for this paper J. Wu, R.H. Petrov, M. Naeimi, Z. Li, J. Sietsma, "A Microstructural Study of Rolling Contact Fatigue in Rails", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 118, 2014. doi:10.4203/ccp.104.118 Keywords: RCF, MnS inclusion, EBSD, strain concentration, crack propagation, KAM misorientation. Summary In this paper, microstructural features due to rolling contact fatigue in rails were studied by means of microhardness, optical microscope, and high resolution electron backscatter diffraction (EBSD). Significant strain accumulation was found not only in the rail surface but also near MnS inclusions at 680µm beneath the surface. It is shown that the extent of straining at the inclusion is comparable to the one in the rail surface. As a consequence, the MnS inclusions might alter the propagation route of rolling contact fatigue (RCF) cracks. This imposes very strong requirements for metallurgy quality control. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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