Abstract: An additively manufactured article comprises a superalloy composition and a microstructure. The microstructure comprises a gamma-prime phase greater than or equal to 35% by volume of the microstructure. The microstructure comprises grains having an average aspect ratio of greater than or equal to 5.

Abstract: A method according for the manufacturing of a component in which walls surround a cavity and the cavity is accessible through at least one aperture formed in one of the walls, according to the following steps: manufacturing of the component by an additive method, in which metallic powder particles are applied to a support layer by layer in a process chamber, and the walls are each manufactured after the application of a layer of the metallic powder particles by melting by means of an energy beam along a predetermined path, connection of the aperture to a flushing device, supply of a liquid etchant into the cavity by means of the flushing device, selective dissolution by the etchant of power particles connected to each other only via sinter necks and/or fusible links and flushing of the etchant and the dissolved powder particles out of the cavity.