Changes in structure and phase composition in the surface of tram rail

0468180 - ÚFM 2017 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Švábenská, Eva - Roupcová, Pavla - Schneeweiss, Oldřich
Changes in structure and phase composition in the surface of tram rail.
METAL 2016: 25th International Conference on Metallurgy and Materials. Ostrava: Tanger Ltd., 2016, s. 867-872. ISBN 978-80-87294-67-3.
[METAL 2016 - Anniversary International Conference on Metallurgy and Materials /25./. Brno (CZ), 25.05.2016-27.05.2016]
Institucionální podpora: RVO:68081723
Klíčová slova: tram rail * microstructure analysis * surface
Kód oboru RIV: JG - Hutnictví, kovové materiály

We have investigated structure and phase composition of surface layer of tram rails after long time running and the results were compared with those obtained on the original part of material. Changes due to effects of severe plastic deformation together with thermal shocks by friction process were expected. The information about structure and phase composition was obtained by optical and scanning electron microscopy, X-Ray Powder Diffraction, Mössbauer Spectroscopy and Glow Discharge Emission Spectroscopy (GDOES) and this was completed by microhardness measurements. The results show that the surface layer in comparison with the original material exhibits important changes in grain structure, an increase in microhardness and high content of iron oxide and hydrooxides. According to the depth profile of the chemical composition measured by GDOES there is an increase in carbon content in the surface layer which can be effect of up-hill diffusion.
Trvalý link: http://hdl.handle.net/11104/0266067