Abstract
By methods of optical, scanning and transmission electron microscopy and microhardness measurement the transformation regularities of structure-phase states, defect substructure, fracture surface and mechanical properties 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. According to the character of fracture and level of structure imperfection the three layers were detected: surface, transition and boundary ones. 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, and 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.
| Original language | English |
|---|---|
| Pages (from-to) | 76-82 |
| Number of pages | 7 |
| Journal | Journal of Surface Investigation |
| Volume | 10 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2016 |
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Keywords
- defect substructure
- degradation
- electron microscopy
- rails
- structure
ASJC Scopus subject areas
- Surfaces, Coatings and Films
Cite this
Surface layer structure degradation of rails in prolonged operation. / Gromov, V. E.; Peregudov, O. A.; Ivanov, Y. F.; Morozov, K. V.; Alsaraeva, K. V.; Semina, O. A.
In: Journal of Surface Investigation, Vol. 10, No. 1, 01.01.2016, p. 76-82.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface layer structure degradation of rails in prolonged operation
AU - Gromov, V. E.
AU - Peregudov, O. A.
AU - Ivanov, Y. F.
AU - Morozov, K. V.
AU - Alsaraeva, K. V.
AU - Semina, O. A.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - By methods of optical, scanning and transmission electron microscopy and microhardness measurement the transformation regularities of structure-phase states, defect substructure, fracture surface and mechanical properties 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. According to the character of fracture and level of structure imperfection the three layers were detected: surface, transition and boundary ones. 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, and 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.
AB - By methods of optical, scanning and transmission electron microscopy and microhardness measurement the transformation regularities of structure-phase states, defect substructure, fracture surface and mechanical properties 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. According to the character of fracture and level of structure imperfection the three layers were detected: surface, transition and boundary ones. 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, and 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.
KW - defect substructure
KW - degradation
KW - electron microscopy
KW - rails
KW - structure
UR - http://www.scopus.com/inward/record.url?scp=84958787244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84958787244&partnerID=8YFLogxK
U2 - 10.1134/S1027451015060282
DO - 10.1134/S1027451015060282
M3 - Article
VL - 10
SP - 76
EP - 82
JO - Journal of Surface Investigation
JF - Journal of Surface Investigation
SN - 1027-4510
IS - 1
ER -