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

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 (hig...

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Veröffentlicht in:JETP letters 2012-11, Vol.96 (6), p.380-384
Hauptverfasser: Kogtenkova, O. A., Straumal, B. B., Protasova, S. G., Gornakova, A. S., Ziȩba, P., Czeppe, T.
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Sprache:eng
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Zusammenfassung: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.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364012180063