Conclusions
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1.
For M1 copper the critical temperature with over 56% deformation is 150°C. The copper recrystallizes completely on heating at 250°C.
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2.
In their resistance to weakening the bronzes investigated are arranged in the following sequence: Cu−Cd, Cu−Ag, Cu−Mg, Cu−Cr, Cu−Zr. The Cu−Zr−Cr alloy had the highest resistance to weakening.
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3.
The substantial weakening on heating at 250°C after large deformation (∼90%) as compared with small deformation (17–56%) is no reason for giving up high degrees of deformation. These bronzes retain a high strength and high plasticity after heating at 250°C.
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Literature cited
A. P. Gulyaev, Metal Science [in Russian], Metallurgiya, Moscow (1966).
D. McLean, Mechanical Properties of Metals, Wiley, New York.
M. V. Zakharov et al., Metal. i Term. Obrabotka Metal., No. 9 (1960).
I. P. Kushtalova, Recrystallization and Precipitation Hardening of Metals and Alloys [in Russian], Naukova Dumka, Kiev (1966).
Additional information
TsNII MPS. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 12–14, May, 1971.
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Berent, V.Y., Bushe, N.A. & Portselan, A.A. Resistance to weakening after heating of copper alloys for conductors. Met Sci Heat Treat 13, 359–361 (1971). https://doi.org/10.1007/BF00652434
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DOI: https://doi.org/10.1007/BF00652434