General Electric Company

Gary Edward Trewiler

Stephen Joseph Ferrigno

Ching-Pang Lee

Melvin Robert Jackson

Robert William Bruce

Mark Daniel Gorman

Timothy Joseph Trapp

Charles William Carrier

Matthew J Stewart

Paul Stephen Manicke

Jeffrey Howard Nussbaum

Jeffrey Francis Wessels

Joseph Capozzi

Peter J Rock

Alan Glen Turner

James A Huffman

Melvin Howard Wilkins

Gregory Christopher Firestone

William Henry Harrison

Charles Kammer Christopherson

Leslie M Pommer

John Michael Muldoon

Kenneth Allen Loehle

Daryl Peacock

Matthew Stewart

Kenneth Loehle

Charles K Christopherson

A method for bonding airfoil sections includes aligning upper and stub airfoil sections having upper airfoil pressure and suction sides and stub airfoil pressure and suction sides respectively, pressing together upper and stub airfoil cross sections at upper and stub airfoil distal ends of the upper and stub airfoil sections respectively, and then resistance welding, preferably solid state resistance welding, the upper and stub airfoil sections together along the upper and stub airfoil cross sections by passing electrical current across the upper and stub airfoil cross sections. The upper and stub airfoil sections may be clamped between pressure and suction side upper airfoil electrodes and between the stub airfoil pressure and suction sides respectively. The method may be performed while the stub airfoil section is attached to an airfoil carrier such as a rotor disk rim, a gas turbine engine drum, or a gas turbine engine blade platform.

Solid state resistance welding for airfoil repair and manufacture

Including a disk, a plurality of circumferentially spaced apart airfoils extending radially outwardly from the disk, a plurality of shroud segments being disposed circumferentially between the plurality of airfoils and configured to attach to a corresponding airfoil of the plurality of airfoils and a plurality of wear surfaces, where at least one wear surface of the plurality of wear surfaces is configured and disposed to prevent excessive wear between the adjacent shroud segments. Each shroud segment of the plurality of shroud segments may be attached to a corresponding airfoil by weld connections to permit clearance during translation friction welding of the airfoil to the disk hub are located to avoid high stress areas.

Part span shrouded fan blisk

A method for fabricating a component for a gas turbine engine includes providing a blisk forging fabricated from a first material, inertia welding a second material to the blisk forging to create a bi-alloy blisk forging, and machining the bi-alloy blisk forging to pre-determined dimensions.

Gas turbine engine components and methods of fabricating same

A workpiece structure having a hole therein is repaired by preparing a stack having a first confinement sheet, a first donor sheet, a workpiece structure having a hole therein, a plug of a plug material in the hole, optionally a second donor sheet, and a second confinement sheet. The first confinement sheet, the first donor sheet, the second donor sheet, and the second confinement sheet each overlie the hole. The first confinement sheet and the second confinement sheet each melt at a temperature greater than do the first donor sheet, the plug, and the second donor sheet. The stack is locally heated at the hole using an electrical current source to a temperature sufficiently high to locally melt the first donor sheet, the plug, the second donor sheet, and the workpiece structure. The stack is thereafter cooled to solidify all melted material and form a weldment.

Method for repairing a hole in a metallic workpiece

A fusion welding method is provided for fusion welding at juxtaposed interface surfaces a first member, for example made of a first metal based on at least one of Ru, Rh, Pd, and Pt, with a second member made of a second metal, for example a high temperature alloy based on at least one of Fe, Co, and Ni, including at least one identified element, for example Al, that can form a continuous layer of a brittle intermetallic compound with the first metal that is free of such element. With the interface surfaces disposed in contact, energy is generated at the interface surfaces in a combination of an amount and for a first time selected to be sufficient to heat the interface surfaces to a fusion welding temperature. However, the first time is less than a second time that enables formation at the fusion welding temperature of the continuous layer of the brittle intermetallic compound at the interface surfaces. A welded article is provided with a fusion weld free of such continuous layer of the brittle intermetallic compound.

Fusion welding method and welded article

A process for repairing a compressor rear frame of a gas turbine engine. The process entails removing a seal flange from the inner casing wall of the frame to define an annular face on the casing wall, and fabricating a replacement flange to have an annular face with a radial width greater than the radial width of the annular face of the casing wall. The faces of the flange and wall are mated to form a joint, a penetration-enhancing flux is deposited adjacent the joint, and a single-pass gas tungsten arc welding operation is performed to form a root weldment that extends completely through the joint. The flux is then removed and a gas tungsten arc welding operation is performed to deposit a filler on the root weldment and form a second weldment that completely overlays but does not penetrate through the root weldment.

Welding process

A protected article includes a nickel-base superalloy substrate, an interlayer overlying the substrate, and a protective layer overlying the interlayer. The protective layer has a composition comprising at least one of rhodium, platinum, palladium, and ruthenium. In one composition, palladium is present in an amount of from about 1 to about 41 atomic percent; platinum is present in an amount of about (40+atomic percent palladium) atomic percent for palladium ranging from about 1 atomic percent to about 14 atomic percent and up to about 54 atomic percent for palladium ranging from about 15 atomic percent up to about 41 atomic percent; rhodium is present in an amount of at least about 24 atomic percent; zirconium, hafnium, titanium, and mixtures thereof are present in an amount of from zero up to about 5 atomic percent; and ruthenium is present in an amount of from zero up to about 5 atomic percent, balance impurities. The interlayer has a coefficient of thermal expansion intermediate between that of the substrate and that of the protective layer. The protected article is fabricated by furnishing the substrate, applying the interlayer over the substrate, and applying the protective layer over the interlayer. The application of the protective layer may be, for example, by welding or attachment of a solid piece.

Article with intermediate layer and protective layer, and its fabrication

Growing community of inventors

Loveland, OH, United States of America

Gary Edward Trewiler