Abstract
Abstract The Ni 3 Al-based alloys were hot formed and their dynamic as well as postdynamic recrystallization capability studied. In the as-cast material, the large original grain size and inhomogeneous strain distribution complicate the softening processes. It is very easy to provoke recrystallization in such a material. Strains ranging from 0.05 to 0.2 lead to the nucleation of dynamically recrystallized grains along the primary grain boundaries and twins. On the other hand, to achieve thorough recrystallization is often difficult. It depends chiefly on previous deformation, less on annealing time, temperature or microalloying. In some cases, annealing does not lead to any significant increase of recrystallization fraction but only to the growth of selected grains. The localization of strain plays a dominant role.
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