Abstract
In present paper attempt was made to find a relationship between the mechanical properties of the material in microvolumes and the properties of the material under load. A fractograph-ic analysis of the surface of the fatigued scrap rail with the inner transverse crack is given. The relationship between the fractographic features and the structure of the material is dis-cussed. A sample with an internal transverse crack in the head of the rail was removed from service after an intense cyclical load in the railway switch. For metallographic research, the sample was subjected to three-point bending. On the surface of the destruction of the rail re-vealed three areas, differing in the degree of brittleness of the material.
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