Metal alloy foils

Details Metal alloy foils Metal alloy foils

1994-06-27

1996-04-02

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 48, 428606, B22F 700

Patent

active

055037941

ABSTRACT:
Metal alloy foils are made directly from metal alloy powders by hot pressing. These metal alloy foils are characterized by having a thickness of 0.017 in. or less, and by the fact that they are fine-grained and substantially free of oxygen, nitrogen and deformation-induced defects. In particular, Ti-base alloy foils having an average thickness of about 0.011 in. have been formed directly from Ti-base alloy powders. These as-pressed Ti-base alloy foils are also ductile and adapted for subsequent forming operations, including cold rolling. The deformation which may be imparted in a single pass through cold-rolling to these Ti-base alloy foils is at least about 5%, with up to about 45% deformation imparted to one of these alloys in multiple passes without stress relief annealing. Total reductions in thickness of up to 90% are achieved by a combination of cold-rolling and stress relief annealing.

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"Superalloy Foils by Hot Isostatic pressing" Ritter et al., Ser. No. 08/194,967, filed Feb. 14, 1994. (RD-22,447).
"Method of Making Metal Alloy Foils", A. M. Ritter, et al., Ser. No. 08/223,345, filed Apr. 5, 1994 (RD-22,069).
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