Article

JETP Letters

, Volume 96, Issue 6, pp 380-384

First online:

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

  • O. A. KogtenkovaAffiliated withInstitute of Solid State Physics, Russian Academy of Sciences Email author 
  • , B. B. StraumalAffiliated withInstitute of Solid State Physics, Russian Academy of SciencesNational University of Science and Technology MISIS
  • , S. G. ProtasovaAffiliated withInstitute of Solid State Physics, Russian Academy of Sciences
  • , A. S. GornakovaAffiliated withInstitute of Solid State Physics, Russian Academy of Sciences
  • , P. ZiȩbaAffiliated withInstitute of Metallurgy and Materials Science, Polish Academy of Sciences
  • , T. CzeppeAffiliated withInstitute of Metallurgy and Materials Science, Polish Academy of Sciences

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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.