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H. Liu¹, U. Olofsson², L.T.I. Jonsson^1,3 and P.G. Jönsson¹

¹Division of Applied Process Metallurgy, Department of Materials Science and Engineering, KTH-Royal Institute of Technology, Stockholm, Sweden
²Department of Machine Design, KTH-Royal Institute of Technology, Stockholm, Sweden
³FOI, Division of CBRN Defence and Security, Swedish Defence Research Agency, Umeå, Sweden

Keywords: wheel-rail contact, airborne wear particles, particle number concentration, contact temperature, iron oxide containing particles, oxidative wear, scanning electron microscope.

Summary

Pin-on-disc laboratory tests were carried out to identify the generation of airborne wear particles in wheel-rail contacts under different sliding velocities. The results show that the sliding velocity significantly influences both the number and size distribution of airborne wear particles. A comparison of the contact temperature was obtained during tests. For tests with high sliding velocities (1.2 and 3.4 m/s), the particle number concentration level was related to the elevated contact temperature in selected time intervals. Moreover, morphological and elemental analyses of collected particles and pin worn surfaces were studied by using a scanning electron microscope and field emission-scanning electron microscope. The data suggests that the oxide layers were detected within the pin's worn surfaces and an abundant presence of iron-oxide containing particles was observed. Therefore, it can be concluded that abundant fine and ultrafine airborne particles are more likely to be produced from an oxidative wear process in a wheel-rail contact under high sliding velocities.

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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: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 150 A Pin-On-Disc Study of Airborne Wear Particles from Dry Sliding Wheel-Rail Contacts H. Liu¹, U. Olofsson², L.T.I. Jonsson^1,3 and P.G. Jönsson¹ ¹Division of Applied Process Metallurgy, Department of Materials Science and Engineering, KTH-Royal Institute of Technology, Stockholm, Sweden ²Department of Machine Design, KTH-Royal Institute of Technology, Stockholm, Sweden ³FOI, Division of CBRN Defence and Security, Swedish Defence Research Agency, Umeå, Sweden doi:10.4203/ccp.110.150 purchase the full-text of this paper Full Bibliographic Reference for this paper , "A Pin-On-Disc Study of Airborne Wear Particles from Dry Sliding Wheel-Rail Contacts", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 150, 2016. doi:10.4203/ccp.110.150 Keywords: wheel-rail contact, airborne wear particles, particle number concentration, contact temperature, iron oxide containing particles, oxidative wear, scanning electron microscope. Summary Pin-on-disc laboratory tests were carried out to identify the generation of airborne wear particles in wheel-rail contacts under different sliding velocities. The results show that the sliding velocity significantly influences both the number and size distribution of airborne wear particles. A comparison of the contact temperature was obtained during tests. For tests with high sliding velocities (1.2 and 3.4 m/s), the particle number concentration level was related to the elevated contact temperature in selected time intervals. Moreover, morphological and elemental analyses of collected particles and pin worn surfaces were studied by using a scanning electron microscope and field emission-scanning electron microscope. The data suggests that the oxide layers were detected within the pin's worn surfaces and an abundant presence of iron-oxide containing particles was observed. Therefore, it can be concluded that abundant fine and ultrafine airborne particles are more likely to be produced from an oxidative wear process in a wheel-rail contact under high sliding velocities. purchase the full-text of this paper (price £22) 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 £85 +P&P)
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