Abstract: Methods for deposition of an aluminide coating on an alloy component positioned within a coating compartment of a retort chamber are provided. According to the method, the coating compartment is purged with an inert gas via a first gas line; a positive pressure is created within the coating compartment utilizing the inert gas; the coating compartment is heated to a deposition temperature; and at least one reactant gas is introduced into the coating compartment while at the positive pressure and the deposition temperature to form an aluminide coating on a surface of the alloy component. Retort coating apparatus are also provided.

Abstract: In one aspect, the present disclosure is directed to a method for treating a region of a gas turbine component. The method includes heating the region to a first temperature. One or more surface discontinuities located in the region are welded such that at least a portion of the region is heated to a second temperature. The region is annealed at a third temperature. The second temperature is relatively greater than the first temperature, and the first temperature is relatively greater than the third temperature.

Abstract: Methods for deposition of an aluminide coating on an alloy component positioned within a coating compartment of a retort chamber are provided. According to the method, the coating compartment is purged with an inert gas via a first gas line; a positive pressure is created within the coating compartment utilizing the inert gas; the coating compartment is heated to a deposition temperature; and at least one reactant gas is introduced into the coating compartment while at the positive pressure and the deposition temperature to form an aluminide coating on a surface of the alloy component. Retort coating apparatus are also provided.

Abstract: Various embodiments of the invention include methods for monitoring a gas turbine component. In some cases, a method includes: analyzing a gas turbomachine component to detect at least one of a void or a porosity of the gas turbomachine component while maintaining a structural integrity of the gas turbomachine component during the analyzing; and providing instructions to perform a hot isostatic pressing (HIP) process on the gas turbomachine component in response to at least one of detecting the void or detecting that the porosity exceeds a threshold.

Abstract: A method for controlled removal of a portion of a diffusion coating from a coated superalloy component and a method for rejuvenating a coated superalloy component are provided. The methods include providing the component having an oxide layer, an additive layer between the oxide layer and a diffusion zone, the diffusion zone being between the additive layer and a superalloy substrate of the superalloy component. The methods include selectively removing the oxide layer and a portion of the additive layer by grit blasting, wherein removing creates an exposed portion. Rejuvenating includes applying an aluminide coating to the exposed portion and heat treating at a preselected elevated temperature to form a rejuvenated protective aluminide coating on the superalloy component.

Abstract: A method for controlled removal of a portion of a diffusion coating from a coated superalloy component and a method for rejuvenating a coated superalloy component are provided. The methods include providing the component having an oxide layer, an additive layer between the oxide layer and a diffusion zone, the diffusion zone being between the additive layer and a superalloy substrate of the superalloy component. The methods include selectively removing the oxide layer and a portion of the additive layer by grit blasting, wherein removing creates an exposed portion. Rejuvenating includes applying an aluminide coating to the exposed portion and heat treating at a preselected elevated temperature to form a rejuvenated protective aluminide coating on the superalloy component.

Abstract: A method of refurbishing a seal land on a transition piece of a turbomachine includes applying a wear strip to a wall surface of the seal land, and covering the wear strip with a slot protector.

Abstract: A method of refurbishing a seal land on a transition piece of a turbomachine includes applying a wear strip to a wall surface of the seal land, and covering the wear strip with a slot protector.