Metamorphic processing of alloys and products thereof

Details Metamorphic processing of alloys and products thereof Metamorphic processing of alloys and products thereof

C - Chemistry, Metallurgy

22

C

C22C 9/00 (2006.01) C22C 9/06 (2006.01) C22F 1/08 (2006.01)

Patent

CA 2164064

In accordance with one aspect of the present invention is the metamorphic processing of a beryllium-copper alloy. The alloy is (i) thermodynamically treated for greater than about 10 hours at a temperature generally within a range of 900° to 1500°F, (ii) warm worked at greater than about 30% strain at a strain rate ~ greater than or equal to about (2.210 × 7)/exp[(2.873 × 10 4)/(T + 459.4°)], where T is in °F, at the temperature, (iii) annealed at a temperature between 1375° and 1500°F for about 15 minutes to about 3 hours, (iv) water quenched, and (v) thermal hardened at a temperature generally within a range of about 480° and 660°F. Grain size is reduced with concomitant improvements in ultimate strength, toughness, total elongation, % reduction in area and ultrasonic inspectability.

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