Abstract
Results are presented for an experimental study of the effect of cooling to 77 K on the dynamic crack resistance and impact strength of steels ON9 and 07Kh13N4AG20. Features are noted for the change in failure resistance of these metals in the temperature range 293-77 K with an increase in loading rate to 1.5 m/sec. It is established that crack resistance characteristics of the test steels are somewhat higher in the case of dynamic loading than with static loading, but impact strength of the materials decreases with cooling.
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GOSR 9454-78. Metals. Method for Impact Bend Testing at Reduced, Room, and Elevated Temperatures. Introduced 01.01.79.
O. Ya. Znachkovskii and L. S. Novogrudskii, “Effect of cooling to 4.2 K on the strength and crack resistance of basic metal and a welded joint of steel 07Kh13N4AG20,” Probl. Prochn., No. 9, 45–48 (1990).
O. Ya. Znachkovskii and L. S. Novogrudskii, “Resistance to failure of economically alloyed steel ON9 with cooling to 4.2 K,” Probl. Prochn., No. 9, 72–75 (1990).
GOST 25506-86, Strength Analysis and Testing. Mechanical Test Methods for Metals. Determination of Crack Resistance Characteristics (Fracture Toughness) with Static Loading. Introduced 01.01.86.
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Translated from Problemy Prochnosti, No. 10, pp. 43–46, October, 1990.
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Znachkovskii, O.Y., Izarov, M.A. Effect of loading rate on the failure resistance of economically alloyed steels at low temperatures. Strength Mater 22, 1437–1441 (1990). https://doi.org/10.1007/BF00767227
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DOI: https://doi.org/10.1007/BF00767227