| Autor: |
Peregudov, Oleg, Gromov, Victor, Ivanov, Yurii, Morozov, Konstantin, Alsaraeva, Krestina, Semina, Olga |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2015, Vol. 1683 Issue 1, p020179-1-020179-4, 4p, 2 Black and White Photographs, 1 Chart |
| Abstrakt: |
By methods of scanning and transmission electron microscopy the transformation regularities of structurephase states, defect substructure, fracture surface of rail surface layer up to 10 mm deep in process of long-term operation (passed tonnage of gross weight 1000 mln tons) were revealed. It has been shown that the surface layer ~20 µm in thickness has a multiphase, submicro- and nanocrystalline structure and it contains micropores and microcracks. The increased density of bend extinction contours at 2 mm depth from the tread contact surface was noted. The analysis of structure morphological constituents and internal stress fields, created by intra- and interphase boundaries after long operation was carried out. It was shown that the maximum amplitude of stress fields was formed on the interphase boundary the globular cementite particle-matrix. The evaluation of stress fields was done. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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