Abstract
Recent studies have demonstrated that ultrafine-grained alloys processed by severe plastic deformation (SPD) techniques, i.e., equal channel angular pressing (ECAP) or high pressure torsion (HPT), can exhibit enhanced superplacticity at relatively low temperature and/or high strain rates. In this paper we consider the influence of the SPD regimes on microstructure and superplastic behavior of commercial 1421 aluminum alloy. Special attention is paid to processing guidelines for enhancement of superplastic properties through SPD techniques.
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