Abstract:
A method according for the manufacturing of a component in which walls surround a cavity and the cavity is accessible through at least one aperture formed in one of the walls, according to the following steps: manufacturing of the component by an additive method, in which metallic powder particles are applied to a support layer by layer in a process chamber, and the walls are each manufactured after the application of a layer of the metallic powder particles by melting by means of an energy beam along a predetermined path, connection of the aperture to a flushing device, supply of a liquid etchant into the cavity by means of the flushing device, selective dissolution by the etchant of power particles connected to each other only via sinter necks and/or fusible links and flushing of the etchant and the dissolved powder particles out of the cavity.
Abstract:
The invention concerns a wear-resistant edge layer structure for titanium and its alloys which can be subjected to high loads and has a low coefficient of friction and can be used to particular advantage for protecting human implants. In the edge layer structure according to the invention the edge layer comprises a 200 to 400 nm-thick hard-amorphous carbon layer (4), a 50 to 200 nm-thick intermediate layer (3) and a 0.3 to 2.0 mm-thick gas-alloyed layer (2) whose hardness is between 600 and 1400 Vickers hardness0.1. In order to produce the edge layer structure according to the invention, the surface of the component to be protected is first melted, then gas-alloyed in an N2/Ar atmosphere and cleaned. Only then are the intermediate layer and then the hard-amorphous carbon layer deposited by means of the laser-controlled pulsed vacuum arc process (laser arc process).
Abstract:
The output of a continuously pumped, Q-switched, Nd:YAG laser (10) is frequency converted to provide ultraviolet light (62) for forming vias (72, 74) in multi-layered targets (40). The parameters of the output pulses (62) are selected to facilitate substantially clean, simultaneous or sequential drilling or via formation in a wide variety of materials such as metals, organic dielectrics, and reinforcement materials having different thermal absorption characteristics in response to ultraviolet light. These parameters typically include at least two of the following criteria: high average power of greater than about 100 milliwatts measured over the beam spot area, a temporal pulse width shorter than about 100 nanoseconds, a spot diameter of less than about 50 microns, and a repetition rate of greater than about one kilohertz. The laser system (10) and method circumvent conventional depth of cut saturation limitations and can achieve an increased depth of cut per pulse in a target (40) formed of either single- or multi-layered material.
Abstract:
Compositions for brazing of aluminium and aluminium alloys and their use are described. The compositions comprise a fluoride salt based flux; a solder metal, solder alloy or solder alloy precursor; a binder; and a diester as a solvent.
Abstract:
The present disclosure is directed to a system for performing in-situ laser machining on a component within a gas turbine engine, in which the component includes a substrate defining a surface. The system includes a laser system disposed externally of the gas turbine engine, a focusing optic, and a conduit. The laser system includes a laser unit that produces an output beam. The focusing optic is disposed between the laser unit and the component. The conduit defines a first end external of the engine and a second end that ingresses into the engine through an access port. The conduit includes a plurality of mirrors within the conduit. The plurality of mirrors directs the output beam from the laser system onto the component.
Abstract:
A method for forming a bi-metallic structural bulkhead assembly (10) formed from at least two sections. A thin strip of metal (16), metallurgically similar, and weldable to, a plurality of lower metal sections (14) is explosion bonded to an upper metal section (12). The lower section(s) (14) are then welded to the thin metal strip (16), thus forming the structural assembly (10). The structural bulkhead assembly (10) may then be properly machined and subjected to an appropriate heat teatment process.
Abstract:
Laser keyhole welding with a prefiUed narrow gap is disclosed. Alloying filler material may be applied to an edge of a workpiece before aligning two workpiece edges. The aligned workpiece edges form a prefiUed narrow gap. A laser system and a beam delivery system form a laser tool point at the gap to generate a welding keyhole, the laser keyhole is translated along the narrow gap and through the filler material to form a laser weld joint.
Abstract:
Manufacturing a part comprises melting a substance along a path in a layer. At least one of a start point and a stop point of the path lie outside an intended boundary of the layer of the part. The path passes more than once through points on a path segment that defines a one-dimensional curve that tracks the intended boundary.
Abstract:
An abradable seal is provided utilizing a laser to cut a pattern into the surface effective to improve abradability in the area of the pattern.