Abstract: A system for qualifying usability risk associated with subsurface defects in a multilayer coating includes a component having a multilayer coating, an infrared detection device for capturing infrared images of the multilayered coating and a processing unit that is in electronic communication with the infrared detection device where the processing unit generates a subsurface defect map of the multilayer coating based on the infrared images. The system further includes a risk map of the component.

Abstract: Embodiments of the invention relate generally to nut retention devices and, more particularly, to nut retention devices having a strap that can be fixed to a distal end of a threaded member without damage to the threaded member or nut, thereby permitting their reuse. In one embodiment, the invention provides a nut retention device comprising: a body having a nut engaging opening; and a deformable strap extending from the body, wherein, in an operative state, the nut engaging opening immovably receives a nut that is threaded on a threaded member and the strap is positioned to fixedly engage the threaded member to retain the nut.

Abstract: A viewport assembly may allow viewing of a retort chamber while protecting the viewer from heat of the retort chamber through a high-temperature-resistant window in an end wall of the viewport assembly. An access port in the end wall may allow use of tools, such as a welding device. An insulated door between the viewport assembly and the retort chamber may enhance protection and heat retention. The assembly may enhance retention of inert atmosphere in the retort chamber as well as heat, facilitating work on superalloy articles.

Abstract: According to one aspect of the invention, a method for servicing a combustor cap assembly of a turbine includes determining a defect is present in a center ring of the cap assembly, the center ring being disposed within a plurality of vanes, removing the center ring from the cap assembly. The method also includes placing a replacement center ring in the cap assembly, wherein dimensions of the replacement center ring are substantially the same as the center ring that has been removed and brazing the replacement center ring to the plurality of vanes.

Abstract: A fixture and method for adjusting a workpiece are disclosed. The fixture includes a holding device engageable to a workpiece to secure the workpiece, and an adjustment device engageable to a projecting member of the workpiece and movable along a first axis and a second axis. Movement of the adjustment device along the first axis when engaged to the projecting member adjusts the projecting member along the first axis, and movement of the adjustment device along the second axis when engaged to the projecting member adjusts the projecting member along the second axis.

Abstract: Preheated interval welding methods for welding a weld material to a substrate material can include preheating the substrate material to a preheat temperature less than a solidus temperature of the substrate material, melting the weld material to produce molten weld material at a melting distance away from the substrate material, and applying the molten weld material in a plurality of intervals to the substrate material.

Abstract: A method for repairing a shroud tile of a gas turbine is disclosed. The method may generally include removing a portion of the shroud tile along at least one of a first side and a second side of the shroud tile and securing at least one side rail to the shroud tile in place of the removed portion of the shroud tile.

Abstract: A fixture assembly for securing at least one side rail to a shroud tile of a gas turbine is disclosed. The fixture assembly may include a first support member, a second support member, a first guide block and a second guide block. The first and second guide blocks may be formed from a material that has the same or a similar coefficient of thermal expansion as the material used to form at least one of the shroud tile and the at least one side rail. In addition, the first and second support members may be formed from a material that has a lower coefficient of thermal expansion than the material used to form the first and second guide blocks.

Abstract: A method for preparing to refurbish a turbo-machine component includes virtually refurbishing the turbo-machine component, actually refurbishing the turbo-machine component, and comparing the virtually refurbished turbo-machine component to the actually refurbished turbo-machine component.