초록 ▼

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

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.

대표청구항 ▼

A metal alloy foil having a controlled concentration of oxygen and nitrogen as impurities, a thickness less than or equal to 0.017 in. and a non-oriented grain microstructure, said foil being formed directly from a powder by steps comprising selecting a metal alloy powder having a concentration of o

A metal alloy foil having a controlled concentration of oxygen and nitrogen as impurities, a thickness less than or equal to 0.017 in. and a non-oriented grain microstructure, said foil being formed directly from a powder by steps comprising selecting a metal alloy powder having a concentration of oxygen and nitrogen impurities, loading the metal alloy powder into a means for holding comprising a metal container, evacuating the means for holding, hot pressing the means for holding to form a metal alloy foil directly from the metal alloy powder, and removing the metal alloy foil from the means for holding, wherein the concentration of oxygen and nitrogen impurities in the foil is the same as the concentration of oxygen and nitrogen impurities in the metal alloy powder.