Abstract: A titanium alloy comprising Al 4.78 to 6.44 wt. %; V 3.65 to 5.15 wt. %; Mo 1.32 to 3.58 wt. %; Cr 0.75 to 2.28 wt. %; Fe 0.00 to 0.42 wt. %; C 0.00 wt. % to 0.10 wt. %; S 0.00 wt. % to 0.10 wt. %; N up to 500 ppm; O up to 2000 ppm and H up to 150 ppm; the balance being Ti and incidental elements and unavoidable impurities. Such a titanium alloy is useful for manufacturing gas turbine engine components including turbine blades and stators.

Abstract: A method of joining a first component to a second component at respective connection surfaces, comprising, in order, applying a local surface treatment to the connection surface of at least one of the first and second components in order to locally alter the microstructure to a depth of between 60 ?m and 10 mm below the connection surface; and joining the first component to the second component using a welding process.

Abstract: A method of joining a first component to a second component at respective connection surfaces, comprising, in order, applying a local surface treatment to the connection surface of at least one of the first and second components in order to locally alter the microstructure to a depth of between 60 ?m and 10 mm below the connection surface; and joining the first component to the second component using a welding process.

Abstract: The novel nickel-base superalloy useful in an additive manufacturing process or a powder-based manufacturing process includes the following composition in wt %: Cr 8.0-8.5; Co 9.0-9.5; Mo 0.4-0.6; W 9.3-9.7; Ta 2.9-3.6; Al 4.9-5.6; Ti 0.2-1.0; Hf 0-0.05; C 0.005-0.03; B 0.005-0.02; Zr 0.005-0.1; Nb 0.2-1; Mn 0-0.6; and S 0-0.002 (?20 ppm); the balance nickel and incidental elements and unavoidable impurities.

Abstract: A method of repairing a metallic component (formed from a first material) by powder feeding laser deposition, comprises the step of depositing a plurality of first repair layers onto a repair surface of the component to form a first repair zone, the first of the plurality of first repair layers comprising a mixture of A/B by weight of the first material and a second material, each nth successive one of the plurality of first repair layers comprising a change in the proportion of the second material in the mixture, the last of the plurality of first repair layers comprising a mixture of C/D by weight of the first material and the second material.

Abstract: A method (56) for fabricating an integral assembly (24) is disclosed. The method comprises providing (56) a first workpiece (26) having a first surface and a second workpiece (30) having a second surface (54), performing a first bonding process between the first surface of the first workpiece (26) and the second surface (54) of the second workpiece (30) the bulk material of the first workpiece having a friction weld property that makes it more difficult to weld than a friction weld property at the surface.

Abstract: The novel nickel-base superalloy useful in an additive manufacturing process or a powder-based manufacturing process includes the following composition in wt %: Cr 8.0-8.5; Co 9.0-9.5; Mo 0.4-0.6; W 9.3-9.7; Ta 2.9-3.6; Al 4.9-5.6; Ti 0.2-1.0; Hf 0-0.05; C 0.005-0.03; B 0.005-0.02; Zr 0.005-0.1; Nb 0.2-1; Mn 0-0.6; and S 0-0.002 (?20 ppm); the balance nickel and incidental elements and unavoidable impurities.

Abstract: A method for friction welding of inter alia coarse grain superalloy components, involving conditioning a shear zone of components to be welded by; a) pre-determining temperature profile for which the material of the shear zone of the components approaches viscoplasticity but does not undergo undesirable phase transformations, b) introducing friction at one or both surfaces of the components to be welded to provide a pre-defined quantum of energy sufficient to generate a peak temperature of the temperature profile at that surface whilst simultaneously applying pressure to the surfaces which is below a pressure which will cause upset at the surface, c) withdrawing the friction and/or pressure allowing the heat to disperse by conduction through the shear zone; d) after the temperature at the surface falls below peak temperature, repeating steps b) and c); and repeating step d) as necessary until the pre-determined temperature gradient is achieved throughout the shear zone.

Abstract: A method of repairing a metallic component (formed from a first material) by powder feeding laser deposition, comprises the step of depositing a plurality of first repair layers onto a repair surface of the component to form a first repair zone, the first of the plurality of first repair layers comprising a mixture of A/B by weight of the first material and a second material, each nth successive one of the plurality of first repair layers comprising a change in the proportion of the second material in the mixture, the last of the plurality of first repair layers comprising a mixture of C/D by weight of the first material and the second material.

Abstract: A method is disclosed for controlling a process in which a component 4 is moved relative to another component 6 such that at least one of the components 4, 6 experiences a reduction in magnitude in at least one dimension. Such processes may include for example friction welding. The method comprises monitoring energy input to the process and adjusting an input parameter for the process based on the monitored energy input. The monitoring of energy input is performed before any reduction in component magnitude has begun to take place.

Abstract: A method of determining the quality of a friction weld between two components, the method comprising joining two components together using a friction welding process, measuring the loss of length of the components as a function of time during the friction welding process, determining the double differential with respect to time of the loss in length of the components as a function of time, determining the quality of the friction weld by calculating the R2 value of the linear fit to the loss in length of the components as a function of time over a defined time period, determining the end of the defined time period by identifying the start of the final positive peak of the double differential with respect to time of the loss of length of the components as a function of time, calculating R2 from the least square difference of the linear fit over the defined time period of the loss of length of the components as a function of time and comparing the calculated value of R2 with acceptable values of R2 to determine

Abstract: A method is disclosed for controlling a process in which a component 4 is moved relative to another component 6 such that at least one of the components 4, 6 experiences a reduction in magnitude in at least one dimension. Such processes may include for example friction welding. The method comprises monitoring energy input to the process and adjusting an input parameter for the process based on the monitored energy input. The monitoring of energy input is performed before any reduction in component magnitude has begun to take place.

Abstract: A method of determining the quality of a friction weld between two components, the method comprising joining two components together using a friction welding process, measuring the loss of length of the components as a function of time during the friction welding process, determining the double differential with respect to time of the loss in length of the components as a function of time, determining the quality of the friction weld by calculating the R2 value of the linear fit to the loss in length of the components as a function of time over a defined time period, determining the end of the defined time period by identifying the start of the final positive peak of the double differential with respect to time of the loss of length of the components as a function of time, calculating R2 from the least square difference of the linear fit over the defined time period of the loss of length of the components as a function of time and comparing the calculated value of R2 with acceptable values of R2 to determine