Abstract
After severe plastic deformation by the high-pressure torsion, Al-Zn alloys have three various classes of Al/Al grain boundaries (GBs) wetted with a second zinc-rich phase. Completely wetted Al/Al GBs are coated with the layer of a zinc-rich phase more than 30 nm thick. Partially (incompletely) wetted Al/Al GBs contact particles of the zinc-rich phase with a contact angle >60°, but contain no measurable zinc concentration. Pseudopartially wetted Al/Al GBs also contact Zn particles with a contact angle >60°. However, they have a thin interlayer of the zinc-rich phase with a uniform thickness of 2–4 nm, the presence of which explains the unusually high ductility of Al-Zn alloys after high-pressure torsion.
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Original Russian Text © B.B. Straumal, A.A. Mazilkin, X. Sauvage, R.Z. Valiev, A.B. Straumal, A.M. Gusak, 2014, published in Izvestiya VUZ. Tsvetnaya Metallurgiya, 2014, No. 6, pp. 44–50.
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Straumal, B.B., Mazilkin, A.A., Sauvage, X. et al. Pseudopartial wetting of grain boundaries in severely deformed Al-Zn alloys. Russ. J. Non-ferrous Metals 56, 44–51 (2015). https://doi.org/10.3103/S1067821215010198
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DOI: https://doi.org/10.3103/S1067821215010198