The main regularities of the influence of thermocyclic operation on the kinetics of degradation of properties of 25Kh1M1 steel are investigated by the methods of nondestructive testing and the method of complete diagrams. Using the method of microhardness testing, it is established that, during cyclic changes in temperature, the surface of specimens hardens, and their internals layers soften as a result of thermal recovery and self-tempering of the material. It is shown that, in static tension of specimens, after operation, the kinetics of damage accumulation changes. In this case, the surface layer of a polycrystal is considered as an autonomous subsystem. Localized plastic flow is studied on the mesolevel in the surface layer of the material.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 46, No. 1, pp. 90–95, January–February, 2010.
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Marushchak, P.O., Hlad’o, V.B., Bishchak, R.T. et al. Influence of thermocyclic operation on the degradation of properties of a heat-resistant steel. Mater Sci 46, 102–107 (2010). https://doi.org/10.1007/s11003-010-9269-1
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DOI: https://doi.org/10.1007/s11003-010-9269-1