Conclusions
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1.
For work under alternating loads it is possible to use medium-carbon alloy steels whose ultimate strength reaches 2000 N/mm2.
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2.
The use of case-hardened steel for work with prolonged alternating loads does not result in a marked increase of fracture toughness because of the presence of high brittleness of the superficial high-carbon layer.
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Literature cited
V. S. Ivanova and V. F. Terent'ev, The Nature of Metal Fatigue [in Russian], Metallurgiya, Moscow (1975).
Additional information
I. M. Gubkina MING, VNIIBT. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 31–33, May, 1988.
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Sorokin, G.M., Bobrov, S.N., Tsvetkov, I.U. et al. Mechanical properties of steels under cyclic load. Met Sci Heat Treat 30, 356–358 (1988). https://doi.org/10.1007/BF00701045
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DOI: https://doi.org/10.1007/BF00701045