We study the microstructure, mechanical properties, and micromechanism of fatigue fracture of high-strength railway-wheel steel (0.63% C and 0.1% V). The necessity of elevation of the cyclic fracture toughness of this type of steel by isothermal hardening and tempering at 500°C is substantiated. It is shown that the cyclic crack-growth resistance of steel decreases for high loading amplitudes as the load ratio (simulating the influence of residual thermomechanical stresses) increases.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 45, No. 2, pp. 63–70, March–April, 2009.
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Ostash, O.P., Andreiko, I.M., Kulyk, V.V. et al. Influence of the mode of thermal treatment and load ratio on the cyclic crack-growth resistance of wheel steels. Mater Sci 45, 211–219 (2009). https://doi.org/10.1007/s11003-009-9177-4
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DOI: https://doi.org/10.1007/s11003-009-9177-4