113 research outputs found
Degradation of structure and properties of rail surface layer at long-term operation
Get PDFThe microstructure evolution and properties variation of the surface layer of rail steel after passed 500 and 1000 million tons of gross weight (MTGW) have been investigated. The wear rate increases to 3 and 3.4 times after passed 500 and 1000 MTGW, respectively. The corresponding friction coefficient decreases by 1.4 and 1.1 times. The cementite plates were destroyed and formed the cementite particles of around 10-50 nm in size after passed 500 MTGW. The early stage dynamical recrystallization was observed after passed 1000 MTGW. The mechanisms for these have been suggested. The large number of bend extinction contours is revealed in the surface layer. The internal stress field is evaluated
The Relationship between the Structural Transformations and Properties of Polyolefin Articles Produced by Solid-Phase Forming
No full textThe mechanical properties of fibres based on phenylene-1,3,4-oxadiazol copolymers of various compositions
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Electron microscope study of surface topography by geometrical determination of metric characteristics of surface elements
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Determination of the orientation of interconnecting and load bearing parts of the amorphous interlayers of crystallizing polymers
No full textInvestigation of monoamine oxidase activity in the tissues of rabbits exposed to acute stress
No full textOn the applicability of the Mosley formula to determine the orientation of crystalline polymers
No full textThe supermolecular structure changes in fibres based on poly-p-phenylene-1,3,4-oxadiazole during pyrolysis
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