Conclusions
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1.
The structure of dispersion-hardened nickel is due to the texture changes that occur under various deformation and heat treatment conditions.
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2.
The ultimate strength of bars at 1100° increases considerably after additional cold drawing, and subsequent high-temperature annealing does not reduce the mechanical properties at this temperature, which are ensured by the strong axial texture and retention of the original lattice. No effect on the mechanical properties of sheets at 1100° was observed after additional rolling and high-temperature annealing, which induce substantial structural changes.
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3.
Moderate upsetting of bars, in which recrystallization does not occur even at 1400°, creates conditions for intensive recrystallization at low temperatures.
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Literature cited
G. Doble et al., J. Metals,3, No. 1, 140-A (1968).
B. Wilcox and A. Clauer, Acta Met.,20, No. 5, 743 (1972).
A. T. Tumanov et al., "Dispersion-hardened heat-resistant nickel alloys VDU-1 and VDU-2," in: Metallic Composite Materials [in Russian], ONTI VIAM (1972), p. 119.
Additional information
All-Union Institute of Aviation Materials. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 11–15, May, 1977.
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Lyukevich, V.I., Levinskaya, M.K. & Romashov, V.M. Mechanical properties of semifinished products of dispersion-hardened nickel. Met Sci Heat Treat 19, 348–351 (1977). https://doi.org/10.1007/BF00703005
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DOI: https://doi.org/10.1007/BF00703005