Conclusions
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1.
The rate of intergranular slip during high-temperature deformation depends on the condition of the intragranular areas. The intergranular slip increases with the hardening of the grains at a given degree of deformation.
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2.
The structural condition of the ÉI 893 alloy after the stepped heat treatment creates conditions for the reduction of the intergranular slip rate. The development of discontinuities in the grain boundaries is reduced substantially, which increases the plasticity during high-temperature deformation by comparison with the alloy subjected to the simple heat treatment.
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Literature cited
D. McLean and M. Farmer, J. Inst. Metals,85 (1956–1957).
E. E. Levin and B. M. Gugelev, Metal. i Term. Obrabotka Metal., No. 1 (1967).
E. E. Levin and E. M. Pivnik, Modern Methods of Heat Treating High-Alloy Heat-Resisting Alloys, No. 4 [in Russian], Izd. LDNTP (1963).
G. Heckman, ASME, Papers, No. 67 (1967).
H. Conrad, Coll: Mechanical Properties of Materials at Elevated Temperatures [Russian translation], Metallurgiya, Moscow (1965).
V. M. Rozenberg, Creep of Metals [in Russian], Metallurgiya, Moscow (1967).
Additional information
Polzunov TsKTI. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 28–31, March, 1969.
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Levin, E.E., Gugelev, B.M. Deformation capacity of heat-resisting alloys with intragranular hardening. Met Sci Heat Treat 11, 193–195 (1969). https://doi.org/10.1007/BF00658729
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DOI: https://doi.org/10.1007/BF00658729