United States of America As Represented by the Administrator of Nasa

Other

Robert W Carter

Timothy M Smith

R Jeffrey Ding

Robert Ward Carter

Kirby G Lawless

Lewis N Payton

Christopher A Kantzos

Michael J Kulis

An additive manufacturing powdered composite material includes metal particles coated with a coating of ceramic particles. The metal particles may include a ternary NiCoCr alloy, with select additions of minor amounts of other elements. The ceramic particles may include yttrium oxide or other oxides. The composite material is suitable for additive manufacturing (AM) into a component for high temperature (>1000° C.) applications. The AM component includes a metal matrix formed from the alloy, with the ceramic particles dispersed in the matrix.

Additively manufactured oxide dispersion strengthened medium entropy alloys for high temperature applications

A local phase transformation strengthened nickel-base superalloy includes at least 8.0 wt % eta phase formers; at least 7.0 wt % of chi phase formers; less than 12 wt % chromium; at least 18 wt % cobalt; and aluminum. A ratio of eta phase formers:aluminum is (3.2-3.4):1. The eta phase formers can include titanium, tantalum, hafnium, and niobium. The chi phase formers include tungsten and molybdenum. When the superalloy is subjected to elevated temperatures, these levels of components promote eta and chi phase formation along superlattice stacking faults, thereby resulting in a local phase transformation at the stacking faults, which strengthens the superalloy and inhibits creep deformation.

Phase transformation strengthened Ni-based disk superalloy

A gimbaled-shoulder friction stir welding tool includes a pin and first and second annular shoulders coupled to the pin. At least one of the annular shoulders is coupled to the pin for gimbaled motion with respect thereto as the tool is rotated by a friction stir welding apparatus.

Gimbaled-shoulder friction stir welding tool

A friction stir weld tool sleeve is supported by an underlying support pin. The pin material is preferably selected for toughness and fracture characteristics. The pin sleeve preferably has a geometry which employs the use of an interrupted thread, a plurality of flutes and/or eccentric path to provide greater flow through. Paddles have been found to assist in imparting friction and directing plastic metal during the welding process.

Friction stir weld tools

A friction stir welding device that is configured to perform convention friction stir welding as well as self-reacting friction stir welding. A pin passes through an upper shoulder and can selectively attach to and detach from a lower shoulder in a preferred embodiment. A controller maintains the discrete position of, and/or force applied by, the upper and lower shoulders during self-reacting friction stir welding, or maintains the pin at a desired depth and/or applied force during conventional friction stir welding.

Auto-adjustable tool for self-reacting and conventional friction stir welding

This invention is an apparatus for joining the ends of two cylindrical (i.e., pipe-shaped) sections together with a friction stir weld. The apparatus holds the two cylindrical sections together and provides back-side weld support as it makes a friction stir weld around the circumference of the joined ends.

Orbital friction stir weld system

A sealing gasket of foamed plastic is formed at the edge of a filter element of reticulated foam by placing the filter element on a surface adjacent to an open receptacle contoured as a mold for the desired shape of the gasket, filling the receptacle with a foam-forming liquid and avoiding contact between the liquid and the filter element until the liquid begins to froth. The liquid is then permitted to froth and overflow the receptacle on the side facing the filter element. As the froth contacts the filter element and proceeds to cure, it bonds to the edge of the elements without substantially penetrating its open pore network. The result upon curing is a gasket along the edge of a filter element fully bonded thereto without gaps or bypass, yet leaving substantially all of the surface area of the filter element exposed for use as a filter.

Growing community of inventors

Cleveland, OH, United States of America

Robert W Carter