Formation of Gradient Structure–Phase States in the Surface Layers of 100-m Differentially Quenched Rails

V. E. Gromov, A. A. Yur’ev, Yu F. Ivanov, K. V. Morozov, S. V. Konovalov, O. A. Peregudov

Результат исследований: Материалы для журналаСтатья

Аннотация

Abstract—The evolution of the structural-phase states in the surface layers of the head of differentially quenched DT350 rails to a depth of 10 mm are studied by optical microscopy and transmission electron diffraction microscopy along the central axis after the passage of a tonnage of 691.8 mln t gross in the experimental ring of AO VNIIZhT (proof ground for railway transport). The formation of a gradient structure is revealed. In this structure, the scalar and excess dislocation densities, the lattice curvature–torsion amplitude, and the degree of deformation-induced transformation of lamellar pearlite change gradually. The mechanisms of fracture of cementite lamellae are considered.

Язык оригиналаАнглийский
Страницы (с-по)710-715
Число страниц6
ЖурналRussian Metallurgy (Metally)
Том2019
Номер выпуска7
DOI
СостояниеОпубликовано - 1 июл 2019

ASJC Scopus subject areas

  • Metals and Alloys

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