Abstract
Al-0.8%Zr alloy rapidly solidified has an inforced saturated solid solution. The alloy was 80% cold rolled and annealed at 400°, 450°and 500°C. Spherical precipitation prior to progression of recrystallization occured during isothermal annealing at 400°and 450°C, and completion of recrystallization of the alloy was considerably retarded. The competition of preciptitation and recrystallization reactions are illustrated. Solute Zr atoms in the aluminum ma trix considerably retard recrystallization. Spherical particles of a metastable phase uniformly dispersed also further retard recovery and recrystallization of the alloy.
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