Nanophase precipitation strengthened Al alloys processed through the amorphous state
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United States of America Patent
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Issued Date -
Mar 25, 2004
app pub date -
Apr 24, 2003
filing date -
Apr 24, 2002
priority date (Note) -
Abandoned
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Abstract
Aluminum alloys having improved strength characteristics at elevated temperatures (300.degree. C.) are manufactured by combining selected transition metals (Ni, Co, Ti, Fe, Y, Sc) and selected rare earth materials (Er, Tm, Tb, Lu) in amounts of about 2 to 12% and 2 to 15% atomic percent respectively in an amorphous, glassy state and subsequently devitrifying the amorphous material to form a crystalline mix of fcc and L1.sub.2 phase material. Devitrification from the amorphous state may be effected by various means including thermal and thermo mechanical processes.
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