Formation of Gradient Structure–Phase States in the Surface Layers of 100-m Differentially Quenched Rails / V. E. Gromov, A. A. Yurjev, Yu. F. Ivanov [et al.]
Уровень набора: Russian Metallurgy (Metally)Язык: английский.Страна: .Резюме или реферат: 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..Примечания о наличии в документе библиографии/указателя: [References: 26 tit.].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | differentially quenched rails | structure | phase composition | long-term operation | фазовый состав | длительная эксплуатация Ресурсы он-лайн:Щелкните здесь для доступа в онлайнTitle screen
[References: 26 tit.]
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.
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