Abstract: A method of determining a depth of intergranular attack (IGA) on a surface of a metal part includes applying a replicating material on a second surface of the part that is essentially perpendicular to and intersects with the surface of interest. The replicating material is used to create an inverted replica of the microstructure of the second surface. Lengths of the cracks replicated on the replicating material are measured in order to determine the depth of intergranular attack on the surface of the part. In some embodiments, a fixture device may be temporarily attached to the metal part to maintain an edge of the second surface.

Abstract: A method of inspecting a repaired metal alloy part to analyze a microstructure of the metal part includes placing a replicating material on a surface of the metal part to create an inverted replica of the microstructure. The replicating material is then removed from the surface. An image of the inverted replica on the replicating material is magnified in order to evaluate the microstructure for incipient melting and areas of boride concentration. This inspection method facilitates that evaluation without causing any destruction to the metal part.

Abstract: A method of restoring a section of a composite having a honeycomb bonded to a perforated skin includes the steps of separating a first honeycomb from the perforated skin to expose a portion of the perforated skin, inserting pins through perforations in the perforated skin, extending the pins through a repair material, attaching the repair material to the exposed portion of the perforated skin, and attaching a second honeycomb to the repair material. The method may include removing material from the exposed portion of the perforated skin, prior to inserting pins through the perforations, to create a more even bonding surface for attaching the repair material.

Abstract: A thermal management process for enabling the restoration of a surface of a metallic detail in the presence of at least one bonding material, comprising preparing at least one damaged area on a metallic detail; disposing at least one thermal management component upon a bonding material or a surface area proximate to the bonding material to which the metallic detail is joined; masking at least the surface area and the bonding material with a masking agent; and dimensionally restoring a surface of the metallic detail disposed on the article at a processing temperature lower than a temperature which would degrade the bonding material, the substrate, or the bondment interface therebetween.

Abstract: A method of repairing a part, such as a rotating disk/drum rotor of a gas turbine engine. The method includes: heating a contact area of a wrought material and a contact area of a wrought part; and pressing the contact area of the material against the contact area of the part to bond the parts. A method of making a rotating part of a gas turbine engine, comprising: heating a contact area of a wrought material and a contact area of a wrought part; and pressing the contact area of the material against the contact area of the part to bond the parts. The methods may include a subsequent heat treatment to provide the desired strength properties to the joint between the material and the part.

Abstract: The mechanism provides tools and techniques for administering a directory tree of a directory service database by automatically placing user objects in containers and placing containers on servers, without direct instructions from a user. Methods of the mechanism use a hash function to hash a user ID to obtain a proposed directory tree location, and then place a user object for the user at the proposed location. The hash function results may be stored within an email address of the user for later reference. Some methods of the invention also automatically divide containers of the tree between servers, and some automatically move subtrees of user objects into a new partition when a server or server pair is added to a system that stores the directory tree. Similar systems and configured storage media are also provided by the invention to perform user object placement tasks.

Abstract: A method of repairing a part, such as a rotating disk/drum rotor of a gas turbine engine. The method includes: heating a contact area of a wrought material and a contact area of a wrought part; and pressing the contact area of the material against the contact area of the part to bond the parts. A method of making a rotating part of a gas turbine engine, comprising: heating a contact area of a wrought material and a contact area of a wrought part; and pressing the contact area of the material against the contact area of the part to bond the parts. The methods may include a subsequent heat treatment to provide the desired strength properties to the joint between the material and the part.

Abstract: The present invention relates to a process for joining two metal members together. The process comprises the steps of providing two parent metal members to be joined and a prealloyed interlayer foil having a melting point depressant; creating a joint interface by positioning the foil between two spaced apart surfaces of the two parent metal members to be joined together; applying a load substantially transverse to the joint interface which does not cause deformation of the surfaces; and applying localized rapid heating in the area of the joint interface at a temperature sufficient to effect bonding of the two metallic members while causing little or no degradation of microstructural or mechanical properties of the parent metal and a coarsening of grain size in rim portions of the metal members.

Abstract: A tiltable serving device for storing and dispensing a pourable liquid foodstuff such as a gravy, juice, punch or sauce is disclosed. The device includes a container having an upper open end and a pour spout attached to an upper end portion thereof for guiding the flow of a liquid as it is poured from the container. An end portion of the pour spout contains a cornerless hole therethrough which is sized so that a majority portion of a liquid being poured from the container along the pour spout flows over an end of the spout while a minority portion of the liquid flowing along the spout flows through the hole. The hole has an opening on an upper surface of the spout which lies generally parallel to the direction of flow of the liquid flowing along the spout. The pour spout may be in the form of a lip attached to an upper rim portion of the container which extends outwardly and downwardly from the rim.

Abstract: Nickel base superalloy articles, especially gas turbine disks, are provided with substantially enhanced resistance to crack growth through a specific heat treatment. The heat treatment employs a true solution treatment step followed by a subsolvus solution treatment step, followed by at least one aging step. The effect of this series of heat treatment steps is to provide a microstructure having an optimum arrangement of gamma prime particles, with respect to both size and location. Reductions in crack growth rates of several hundred percent relative to prior art heat treatments are achieved.

Abstract: A method is taught for joining a wrought alloy material to a cast alloy, so as to obtain a joint having superior structural integrity. A cast nickel-base superalloy part may be bonded to a wrought nickel-base superalloy part, for example, by positioning a suitable part or blank of said wrought superalloy adjacent to the cast superalloy part, applying a local bonding force to the interface while locally heating the interface to a temperature which causes localized softening, metal flow, and bonding, removing said bonding force, and subjecting the bonded assembly to a local or isothermal heat treatment so as to minimize distortion, optimize properties, and stress relieve the bonded assembly. This method may be used, for example, for the repair or replacement of vane assembly retaining lugs, whereby a replacement lug of a wrought alloy is solid state bonded to the vane assembly in place of the previous retaining lug.

Abstract: A figurine and swing combination useful for various purposes where the figurine is adapted to be received on the swing and retained thereon by a fastener which allows defined relative movement between the figurine and the swing. Also cords are attached to the swing adjacent opposite ends thereof. The cords extend upwardly through cooperative apertures in the figurine to further attach the figurine to the swing yet allow relative movement between the swing and the figurine.

Abstract: A method is taught for the replacement of turbine disk airseal lands, whereby a replacement land ring is solid state bonded to the disk in place of a worn or damaged land.

Abstract: A method is taught for repair of holes in superalloy or titanium materials by using plugs of the same or similar material and heat treatment, whereby a fully recrystallized joint interface is achieved between the plug and the walls of the hole.

Abstract: Birdfeeder arrangements for feeding birds or other animals which include an enclosure of selected configuration defining a generally vertical hopper, a cover for the hopper, and at least one opening located below the top of the hopper so that granular material placed in the hopper flows by gravity through the opening, and so material which flows out of the opening, and where a generally horizonal surface is provided immediately adjacent the outlet to receive the granular material and support the material which has flowed out of the hopper at the angle of repose of the material.

Abstract: Component for an integrated optical system, in particular for guiding electromagnetic radiation in the visible and/or infrared wavelength range. The component comprises a monocrystalline substrate of a material having a garnet structure and a refractive index n.sub.1. A dielectric layer having a refractive index n.sub.2 (n.sub.2 <n.sub.1) is grown epitaxially on a surface of the substrate. An optical waveguide layer having a refractive index n.sub.3 (n.sub.3 >n.sub.2) is grown epitaxially on the dielectric layer.

Abstract: The core engine of a mixed exhaust turbofan aeroengine is provided with a conical afterbody. The normal outlet guide vanes which remove residual swirl from the turbine exhaust gases are dispensed with and replaced by ducts within an afterbody having entries which receive the hot gases in the same manner and at the same angle as the passages between the guide vanes would have done. The hot ducts, whose aspect ratio is preferably transformed between their upstream and downstream ends, extend through the afterbody in substantially straight paths to avoid aerodynamic losses, and intersect its conical surface to form preferably slot-like nozzles from which the turbine exhaust gases issue as flattened jets. The exhaust jets partake of the original axial and tangential/swirl velocity components of the turbine gases, plus a radial component (consequential upon the orientation of the ducts) to achieve good penetration of the bypass stream.

Abstract: A device for propagating magnetic domains includes a monocrystalline nonmagnetic substrate of a rare earth gallium garnet bearing a layer of an iron garnet capable of supporting local enclosed magnetic domains. The iron garnet layer is grown in compression on a (100) face of the nonmagnetic substrate. The iron garnet comprises manganese in part of the iron sites of its crystal lattice, and comprises yttrium and at least one representative selected from the group comprising bismuth and the rare earth metals in the dodecahedral lattice sites. Such a magnetic garnet has a very high uniaxial anisotropy and a high domain mobility. These properties make the device extremely suitable for propagating submicron magnetic domains having diameters as small as 0.4 .mu.m.

Abstract: A device for propagating magnetic domains, comprising a monocrystalline nonmagnetic substrate of a material having a garnet structure, and a layer of an iron garnet grown epitaxially on the nonmagnetic substrate. In the dodecahedral lattice sites, the iron garnet comprises at least a bismuth ion and a rare-earth ion selected from the group consisting of lutetium, thulium, and ytterbium. Such a magnetic garnet combines very high uniaxial anisotropy with a high domain mobility, which properties make the device extremely suitable for the propagation of magnetic domains having diameters from approximately 1 to approximately 2 .mu.m under the influence of comparatively low driving fields.

Abstract: A seal arrangement suitable for sealing between two coaxially mounted, axially restrained, radially spaced apart and relatively rotatable members comprises two concentric, ring-shaped seal elements having adjacent sealing faces. The seal elements are mounted on the respective members by a spline and groove arrangement which permits radial growth or shrinkage of the relatively rotatable members due to their thermal expansion or contraction without such growth or shrinkage being transferred to the seal elements. The arrangement insures that the gap between the sealing faces of the seal elements remains substantially constant during thermal variations.