Conclusions
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1.
The grain size of beryllium is not a single-valued characteristic of the structure; the mechanical properties also depend on the substructure.
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2.
The reduction of the yield strength with increasing recrystallization temperatures is due to a reduction of the dislocation density.
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3.
The increase of the activation volume with increasing annealing temperatures is due to the lower concentration of impurities in the matrix.
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Literature cited
H. Conrad and J. Perlmutter, Conference Intern. sur la Métallurgie du Beryllium, Presses Universitaires de France, Paris (1966), p. 319.
I. I. Papirov and G. F. Tikhinskii, Plastic Deformation of Beryllium [in Russian], Atomizdat, Moscow (1973).
V. E. Ivanov et al., Plastic Deformation of Polycrystalline Beryllium [in Russian], Kharkov Physicotechnical Institute of the Academy of Sciences of the Ukrainian SSR (1973).
L. A. Kornienko et al., "Recrystallization of rolled beryllium", Fiz. Met. Metalloved.,29, 138 (1970).
I. N. Khristenko, I. I. Papirov, and G. F. Tikhinskii, "Effect of grain size on the mechanism of plastic deformation of polycrystalline beryllium", Izv. Akad. Nauk SSSR, Met., No. 7, 246 (1974).
Additional information
Physicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Kharkov. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 74–76, June, 1978.
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Khristenko, I.N., Kornienko, L.A. & Nikolaenko, A.A. Effect of recrystallization temperature on the mechanical properties of beryllium. Met Sci Heat Treat 20, 509–512 (1978). https://doi.org/10.1007/BF00774006
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DOI: https://doi.org/10.1007/BF00774006