Conclusions
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1.
An increase in the strength of the steel as the result of warm deformation does not lead to an increase in the tendency of the steel toward retard fracture.
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2.
The high plasticity in tension of 30Kh8N8M2GS2 steel does not guarantee the absence of retarded fracture. The reason for this, as for other metastable austenitic steels, is apparently the formation of fresh martensite in deformation which possesses a high level of internal microstresses.
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Literature cited
Yu. G. Virakhovskii and Ya. B. Gurevich, "The influence of strengthening treatment conditions on the mechanical properties of metastable austenitic steels," in: Problems of Physical Metallurgy and the Physics of Metals [in Russian], No. 1, Metallurgiya, Moscow (1972), pp. 148–156.
V. I. Sarrak, S. O. Suvorova, and E. N. Artemova, "The phenomenon of retarded fracture in chrome-manganese steel with metastable austenite," Dokl. Akad. Nauk SSSR,290, No. 6, 1371–1374 (1986).
S. M. Baranov, V. I. Sarrak, Zh. R. Topaz, and G. A. Filippov, "Internal adsorption of impurities and the tendency of hardened steel with different methods of deoxidation toward retarded fracture," Fiz.-Khim. Mekh. Mater., No. 6, 59–63 (1979).
Additional information
I. P. Bardin Central Scientific-Research Institute for Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 45–47, November, 1987.
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Sarrak, V.I., Artemova, E.N. & Virakhovskii, Y.G. Design strength of metastable austenitic steels. Met Sci Heat Treat 29, 856–857 (1987). https://doi.org/10.1007/BF00707759
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DOI: https://doi.org/10.1007/BF00707759