Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Post sintering operation
Patent
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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Hughes John R.
Ritter Ann M.
Anderson Edmund P.
General Electric Company
Greaves John N.
Magee Jr. James
Walsh Donald P.
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