Abstract
Complementary optical and transmission electron microscopy and differential scanning calorimetry analyses were used to study the interaction between precipitation and recrystallization in aluminum alloy 3003, thermomechanically treated to produce different initial states of strain hardening and manganese supersaturation. These studies show that precipitation of manganese on subgrain boundaries prior to recrystallization results in a coarse, elongated grain structure, which is often undesirable in commercial alloys of this type. The results also demonstrate the effectiveness of differential scanning calorimetry for analyzing complex microstructural problems associated with transition elements in aluminum alloys.
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