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