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- Title
MICROSTRUCTURE IN WORN SURFACE OF HADFIELD STEEL CROSSING.
- Authors
ZHANG, F. C.; LV, B.; WANG, T. S.; ZHENG, C. L.; LI, M.; ZHANG, M.
- Abstract
In this paper a failed Hadfield (high manganese austenite) steel crossing used in railway system was studied. The microstructure in the worn surfaces of the crossing was investigated using optical microscopy, scanning electron microscopy, transmission electron microscopy and Mössbauer spectroscopy. The results indicated that a nanocrystallization layer formed on the surface of the crossing served. The formation mechanism of the nanocrystalline is the discontinuous dynamic recrystallization. The energy for the recrystallization nucleus formation originates from the interactions between the twins, the dislocations, as well as twin and dislocation. High-density vacancies promoted the recrystallization process including the dislocation climb and the atom diffusion.
- Subjects
MICROSTRUCTURE; AUSTENITIC steel; HEAT treatment of metals; ELECTRON microscopy; SEPARATION (Technology)
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2009, Vol 23, Issue 6/7, p1185
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S021797920906066X