CHANGE OF STRUCTURAL-PHASE STATES OF RAILS AT DIFFERENT STAGES OF LONG-TERM OPERATION
Abstract
Structure-phase state of 100-meter differentially quenched rails at different depth up to 10 mm in rail head along the central axis and fillet symmetry axis in initial state and after different time periods of extreme long-term operation (passed tonnage of 691.8; 1411 and 1770 million. gross tons) has been studied using methods of transmission electron diffraction microscopy. Significant transformation of structural-phase state of lamellar pearlite grains is noted, accompanied by destruction of cementite plates by cutting them with moving dislocations and by dissolving with carbon withdrawal from the cementite lattice at dislocation lines, low-angle and high-angle boundaries. Formation of a subgrain structure containing nanosize cementite particles located at joints and along the boundaries of subgrains was revealed. Gradient character of scalar and excess density of dislocations along the section of the rail head is revealed.
About the Authors
Roman V. Kuznetsov
Siberian State Industrial University
Russian Federation
Russian Federation
External doctorate student of the Chair of Natural Sciences. Named after Professor V.M. Finkel
Yurii F. Ivanov
Institute of High-Current Electronics SB RAS
Dr. Sci. (Phys.-Math.), Professor, Chief Researcher
Yuliya A. Shlyarova
Siberian State Industrial University
doctorate student of the Chair of Natural Sciences. Named after Professor V.M.
Finkel
Krestina V. Aksenova
Siberian State Industrial University
Cand. Sci. (Eng.), Cand. Sci. Eng., Associate Professor of the Chair of Natural
Sciences. Named after Professor V.M. Finkel
Vasilii E. Kormyshev
Siberian State Industrial University
Cand. Sci. (Eng.), Cand. Sci. Eng., Senior researcher of the Research department
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Review
For citations:
Kuznetsov R., Ivanov Yu., Shlyarova Yu., Aksenova K., Kormyshev V. CHANGE OF STRUCTURAL-PHASE STATES OF RAILS AT DIFFERENT STAGES OF LONG-TERM OPERATION. Bulletin of the Siberian State Industrial University. 2021;(3):20-26. (In Russ.)
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