Abstract:
A method of bonding a titanium article to another metal article using a superplastic interlayer is disclosed. A fine-grain titanium alloy interlayer is provided between faying surfaces of the articles to be bonded. The interlayer has an alpha-beta microstructure and an average grain size of less than about 1-3 microns (.001-.003 mm) in at least one plane. The articles to joined and the interlayer are heated to between 1000 °F (538 °C) and 1500 °F (816 °C). A sufficiently large compressive force is then applied to the articles to cause superplastic deformation of the interlayer and bonding of the articles.
Abstract:
Physical vapor deposition is utilized to deposit repair material on Ti alloy turbine components. In a preferred embodiment, a damaged area (30) of an airfoil leading edge is machined to produce a base surface (50), and a backing element (52) is attached to the airfoil (26) to receive the repair material which can subsequently be machined to the appropriate profile.
Abstract:
A deposition apparatus (20) comprising: a chamber (22); a process gas source (62) coupled to the chamber; a vacuum pump (52) coupled to the chamber; at least two electron guns (26); one or more power supplies (30) coupled to the electron guns; a plurality of crucibles (32,33,34) positioned or positionable in an operative position within a field of view of at least one said electron gun; and a part holder (170) having at least one operative position for holding parts spaced above the crucibles by a standoff height H. The standoff height H is adjustable in a range including at least 22 inches.
Abstract:
A coating apparatus comprises a coating chamber for coating the articles. The at least one preheat chamber is coupled to the coating chamber. The at least one loading station has a proximal end connectable to at least one of the preheat chambers when in an installed position at a distal end of the preheat chamber. The loading station further includes a carrier for carrying the articles and a drive system. The drive system is positioned to move the carrier between: a loading/unloading position of the carrier in the loading station; a preheat position of the carrier in the preheat chamber to which the loading station is connected; and a deposition position of the carrier in the coating chamber. A gas source is connected to the preheat chamber.
Abstract:
A method for renewal of turbine part made of titanium alloy that has lost material from place of destruction is performed through fixation of element of support with first surface to part. Element of support is placed in such way that first part of first surface is placed along the part and second part of first surface is placed near the place of destruction, material based on Ti is deposited through deposition from vapor in place of loss of material in such way that deposited material based on Ti is build-in on part and second part of first surface.
Abstract:
An electron beam vapor deposition apparatus includes a coating chamber including a coating zone for depositing a coating on a work piece. A coating device includes at least one crucible for presenting at least one source coating material. The coating device includes a first deposition mode of depositing the at least one source coating material and a second deposition mode of depositing the at least one source coating material. At least one electron beam source evaporates the at least one source coating material for deposit onto the work piece. A controller is configured to control a speed of movement of the work piece in the coating zone during the coating operation in response to the first deposition mode and the second deposition mode.
Abstract:
Disclosed is apparatus and method for electrochemically finishing the edges of airfoils and other thin edged objects. When the edge on an airfoil varies in thickness along its length, a tapered electrode is provided which has both a decreased diameter and increased spacing distance, providing a means for obtaining an edge with a radius proportioned to the thickness. Generally, in the system having an electrode with a unit surface area A, and with an electrode-workpiece surface spacing distance S, both A and S vary so that the ratio A/S is lowered for electrode portion proximate to edge portions having lowered thickness.