Abstract: Nickel-base alloys with improved elevated temperature creep and stress rupture lives are disclosed which are particularly useful for components in gas turbine engines exposed to high temperatures and stresses for long periods of time. The alloys are nickel-based consisting essentially of 0.005 to 0.15% C, 0.10 to 11% Mo, 0.10 to 4.25% W, from 12 to 31% Cr, 0.25 to 21% Co, up to 5% Fe, 0.10 to 3.75% Nb, 0.10 to 1.25% Ta, 0.01 to 0.10% Zr, 0.10 to 0.50% Mn, 0.10 to 1% V, l.8-4.75% Ti, 0.5 to 5.25% Al, less than 0.003% P, and 0.004 to 0.025% B. Key to the improvement of creep and stress rupture lives is the extremely low P content in conjunction with high B contents.

Abstract: A process for manufacturing large diameter, spray formed billets, rings, or tubular forms by spraying atomized molten metal onto a rotating surface. The rotating surface has a collector surface that is maintained at a predetermined temperature or reheated to the predetermined temperature by an external heat source. The external heat source impinges upon the collector surface to form a reheated or preheated zone. The external heat may be provided by a laser, high temperature flame, plasma arc, electric induction or radiation source. The molten metal is sprayed onto the collector surface in the reheated or preheated zone. Apparatus for carrying out the process is also disclosed.

Abstract: Precipitation hardening (PH) stainless steels heat treatable to yield strength levels in the range of 200 ksi with exceptionally high fracture toughness are achieved in alloys consisting essentially of 12.25-13.25% chromium, 7.5-8.5% nickel, 2.0-2.5% molybdenum, 0.8-1.35% aluminum, not over 0.05% carbon, not over 0.10% silicon, not over 0.10% manganese, not over 0.010% phosphorus and with especially critical amounts of not over 0.0020% (20 ppm) nitrogen, not over 0.0020% (20 ppm) sulfur, not over 0.0026% (26 ppm) nitrogen plus sulfur; not over 0.04% titanium, and remainder essentially Fe.

Abstract: A nickel base alloy is provided having excellent hot and cold workability and superior corrosion resistance to a variety of media including deep sour gas well environments and highly corrosive oxidizing environments. The alloy consists essentially of, by weight, about 27 to 33% chromium, about 8 to 12% molybdenum, about 1 to 4% tungsten, and the balance nickel. The alloy may also contain as impurities or as additions, up to about 1.5% iron, up to about 0.15% carbon, up to about 1% aluminum, up to about 1% titanium and up to about 2% columbium.

Abstract: Powdered metal of improved cleanliness and uniformity of particle size is produced by directing a stream of the molten metal into a container having peripherial walls formed of a porous material, such as ceramic foam, having a network of fine passageways extending therethrough. The container is rotated to centrifugally force the molten metal through the porous peripherial walls of the container and to eject the molten metal from the container in the form of fine droplets while inclusions present in the molten metal are filtered and retained in the porous ceramic material, and whereby a metal powder is formed upon cooling and solidifying of the droplets.