C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 23/00 (2006.01) B22F 3/00 (2006.01) B22F 3/02 (2006.01) C22C 1/04 (2006.01) C22F 1/06 (2006.01)
Patent
CA 2084415
2084415 9119822 PCTABS00008 A magnesium base metal component is forged from a billet by subjecting the billet to a forging process using multiple steps in a closed-die or an open-die forging and a forging temperature ranging from 200 ·C to 300 ·C. The billet is compacted from a rapidly solidified magnesium based alloy defined by the formula MgbalAlaZnbXc, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium, and yttrium, ''a'' ranges from about 0 to 15 atom percent, ''b'' ranges from about 0 to 4 atom percent, ''c'' ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. The alloy has a uniform microstructure comprised of a fine grain size ranging from 0.2-1.0 µm together with precipitates of magnesium and aluminum containing intermetallic phases of a size less than 0.1 µm. Upon being forged the component exhibits, in combination, excellent mechanical strength and ductility, making it especially suited for aerospace structural applications.
Chang Chin-Fong
Das Santosh K.
Raybould Derek
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
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