Article ID Journal Published Year Pages File Type
1621389 Journal of Alloys and Compounds 2009 5 Pages PDF
Abstract
Differential scanning calorimetry, hardness testing, electrical conductivity measurements and microstructural analysis were employed in the present work to investigate the response of twin-roll cast Al-0.8Fe-0.6Si strips to interannealing without prior homogenization. Recrystallization which occurs at 400 °C in sheet samples cold rolled only lightly (ɛ ∼ 0.2) is gradually displaced to lower temperatures with increasing strain until ɛ ∼ 2.3. Precipitation occurs largely before a measurable recrystallization reaction at low strains, ɛ < 2.3, producing an acceptable grain structure across the section. The interaction of the two reactions at ɛ > 2.3 is believed to be responsible for a decreasing recrystallized fraction and for coarse grains at the surface where the interaction is likely to be most pronounced. Interannealing of the Al-0.8Fe-0.6Si alloy without a homogenization treatment produces acceptable grain structures across the section of the strip for much of the cold rolling strain range. It is thus concluded that Al-0.8Fe-0.6Si foil stock, intended for cosmetic foil applications where formability is not critical, could be processed without a high-temperature annealing treatment.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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