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Effect of the wetting of grain boundaries on the formation of a solid solution in the Al-Zn system

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Abstract

Phase transitions in the bulk and at grain boundaries in the (Al-20 wt % Zn) alloy have been studied by means of differential scanning calorimetry and transmission electron microscopy. Polycrystals with a high specific area of grain boundaries have been obtained using severe plastic deformation (high-pressure torsion). It has been shown that the Zn-based solid phase completely wets the grain boundaries in aluminum at a temperature of 200°C. The position of the grain boundary solvus line (solubility line), which is above the bulk solvus by 40–45 K, has been determined.

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Correspondence to O. A. Kogtenkova.

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Original Russian Text © O.A. Kogtenkova, B.B. Straumal, S.G. Protasova, A.S. Gornakova, P. Zieba, T. Czeppe, 2012, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2012, Vol. 96, No. 6, pp. 419–423.

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Kogtenkova, O.A., Straumal, B.B., Protasova, S.G. et al. Effect of the wetting of grain boundaries on the formation of a solid solution in the Al-Zn system. Jetp Lett. 96, 380–384 (2012). https://doi.org/10.1134/S0021364012180063

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  • DOI: https://doi.org/10.1134/S0021364012180063

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