Conclusions
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1.
In alloys with a total concentration of 5.5–7.0% Zn+Mg an increase of the zinc concentration increases the strength of the alloy, while an increase of the magnesium concentration improves the stress corrosion resistance.
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2.
With a change in the ratio of Zn/Mg (constant total concentration) the fine structure changes. An increase of the zinc concentration leads to more dispersed precipitation with formation of a narrow zone free of precipitates in the grain boundaries.
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3.
The addition of manganese, zirconium, and chromium to Al−Zn−Mg alloys substantially increases the stress corrosion resistance due to the effect on the precipitation process and the creation of dislocation arrays.
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Literature cited
I. N. Fridlyander et al., in: Aluminum Alloys, No. 3 [in Russian]. Mashinostroenie, Moscow (1964)
D. Denis, I. Monlin, and A. Guilhandz, Les memoires scientifiques de la Revue de Metallurgie,68. No. 2 (1969).
J. Inst. Metals,95, No. 3, 31 (1967).
I. N. Fridlyander et al., Metal. i Term. Obrabotka Metal., No. 8 (1966).
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 47–50, March, 1972.
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Gerchikova, N.S., Fridlyander, I.N., Zaitseva, N.I. et al. Change in the structure and properties of Al−Zn−Mg alloys. Met Sci Heat Treat 14, 233–236 (1972). https://doi.org/10.1007/BF00690772
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DOI: https://doi.org/10.1007/BF00690772