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- W2996370596 abstract "Abstract Pearlitic steels, with a combination of good strength and wear properties, are commonly used for railway rails. The passage of trains creates large shear strain gradients in the surface layer of rails. Knowledge of the microstructural evolution and material properties as related to the shear strain in this layer is therefore important for prediction both of crack evolution and fatigue life. A bi-axial torsion-compression machine was used to deform fully pearlitic R260 rail steel test bars to create a similar gradient structure. Uniaxial tension and compression tests were performed on these pre-deformed test bars to evaluate the mechanical properties of the material. The local microstructural parameters, such as thickness of the ferrite and cementite lamellae, the dislocation density in the ferrite lamellae, the interlamellar spacing and eth local hardness at different places across the diameter of the bars, as well as microstructural evolution across the radius, were characterized. An attempt to set up a correlation between the local microstructural parameters, hardness and the macro mechanical properties is made and discussed in the present study." @default.
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- W2996370596 date "2019-08-01" @default.
- W2996370596 modified "2023-09-23" @default.
- W2996370596 title "Effect of strain gradient on the microstructure and mechanical properties of pearlitic steel" @default.
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- W2996370596 doi "https://doi.org/10.1088/1757-899x/580/1/012027" @default.
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