The Boeing Company

Hamilton Sundstrand Space Systems International, Inc.

Pratt & Whitney Rocketdyne, Inc.

Aerojet Rocketdyne of De, Inc.

Daniel Edward Matejczyk

Thomas J Van Daam

William Determan

Leslie G Fritzemeier

Clifford C Bampton

Sherwin Yang

Colin L Swingler

A manufacturing process includes additive manufacturing a component; and precipitating carbides at grain boundaries of the component.

Additive manufacturing for elevated-temperature ductility and stress rupture life

A method of forming a nanocomposite thermoelectric material having microstructural stability at temperatures greater than 1,000&#xb0; C. The method includes creating nanocrystalline powder by cryomilling. The method is particularly useful in forming SiGe alloy powder.

High temperature stable nanocrystalline SiGe thermoelectric material

A thermal expansion compensator is provided and includes a first electrode structure having a first surface, a second electrode structure having a second surface facing the first surface and an elastic element bonded to the first and second surfaces and including a conductive element by which the first and second electrode structures electrically and/or thermally communicate, the conductive element having a length that is not substantially longer than a distance between the first and second surfaces.

Method of assembling a thermal expansion compensator

Thermal expansion compensator having an elastic conductive element bonded to two facing surfaces

High strength aluminum alloy powders, extrusions, and forgings are provided in which the aluminum alloys exhibit high strength at atmospheric temperatures and maintain high strength and ductility at extremely low temperatures. The alloy is produced by blending about 89 atomic % to 99 atomic % aluminum, 1 atomic % to 11 atomic % of a secondary metal selected from the group consisting of magnesium, lithium, silicon, titanium, zirconium, and combinations thereof, and up to about 10 atomic % of a tertiary metal selected from the group consisting of Be, Ca, Sr, Ba, Ra, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, W, and combinations thereof. The alloy is produced by nanostructure material synthesis, such as cryomilling, in the absence of refractory dispersoids. The synthesized alloy is then canned, degassed, consolidated, extruded, and optionally forged into a solid metallic component. Grain size within the alloy is less than 0.5 &#x3bc;m, and alloys with grain size less than 0.1 &#x3bc;m may be produced.

Cryomilled aluminum alloys and components extruded and forged therefrom

Method for preparing cryomilled aluminum alloys and components extruded and forged therefrom

A nanophase composite duct assembly and method of fabricating the same are provided that comprise an ultra-high strength nanophase aluminum alloy duct joined with a ceramic particulate reinforced metal matrix fitting, preferably using solid-state friction welding. The nanophase aluminum alloy duct is fabricated by extruding a billet formed by a process of cryogenic milling the alloy, followed by out-gassing, then hot isostatic pressing. The fitting is fabricated by combining a ceramic particulate with a metal matrix, preferably by powder processing or liquid metal infiltration. Further, the solid-state friction welding may comprise inertial welding, friction stir welding, or a combination thereof. As a result, a lightweight duct assembly is provided for high-pressure liquids such as propellants in rocket engines.

Growing community of inventors

West Hills, CA, United States of America

Daniel Edward Matejczyk