Patent ID: 8480368

Claim:
A process of fabricating a rotating component having a rotational axis, the process comprising: fabricating at least two preforms corresponding to at least two portions of the component, each of the preforms comprising an interface surface at which the preforms can be joined to locate a first of the portions in a radially outward direction from a second of the portions; inertia welding the preforms together to form a profile and so that the interface surfaces thereof form a solid-state weld joint located between portions of the profile corresponding to the portions of the component, the solid-state weld joint containing a finer-grained material relative to material in the portions of the profile and defining joint surfaces located on opposite axial surfaces of the profile; and then forging the profile with dies to produce a forging containing forging portions corresponding to the portions of the component, the dies defining first and second die cavities, at least one of the die cavities having a recess into which the finer-grained material from the solid-state weld joint is expelled during forging to purge a joint region of the forging between the forging portions of the finer-grained material, the joint region containing grains distorted in an axial direction of the forging.