Abstract: A method for providing CAM manufacturing instructions for the powder-bed-based additive manufacturing of a component wherein a geometry of the component, with a solid material region, a transition region, and a porous component region, is defined on the basis of CAD data. Irradiation parameters for the manufacturing of the component, including an irradiation power, a scanning speed, a scanning pitch, and a layer thickness, are varied within the transition region in such a way as to form a porosity gradient of the structure of the component between the solid material region of the component and the porous component region.

Abstract: A method of additive manufacturing includes a) providing a component geometry with a hole and, b) selectively irradiating a powder bed with an energy beam according to the geometry in a layerwise manner, wherein in layers of the component including the hole, the respective regions which define the hole are irradiated with the energy beam such that a supporting structure is generated in the hole having a lower rigidity than a structure of the component. The supporting structure is used for counteracting stress or distortion during the additive buildup. A computer program product and apparatus correspond to the method.

Abstract: A computer-implemented method of calculating a gap distance between a support structure and a component which is to be build up additively by powder bed fusion, includes: a) providing a component design of the component, b) selecting at least on support surface of the component based on the provided component design and a process analysis, wherein the support surface requires support during the buildup, c) providing a support design of a support structure for supporting the component during the buildup, d) recording CAM-data for the buildup of the component, and, e) calculating an optimal gap distance to be hold during the buildup between the support structure and the support surface, wherein the calculation is based on the selected support surface and the recorded CAM-data, wherein the gap distance is further rated to be large enough to avoid a structural connection between the support surface and the support structure.

Abstract: A component wall of a hot gas component for a gas turbine, which in a double-walled design, has an outer wall which is hotter and an inner wall which is cooler during operation. The interior is divided by partition walls extending between the inner and outer walls. A coolant flows into the interior through inlet openings in the inner wall and out through outlet openings in the outer wall. An inlet cavity is directly connected to at least one of the inlet openings without being directly connected to outlet openings. A second cavity is provided directly next to the inlet cavity. The second cavity is directly connected, as an outlet cavity, only to at least one of the outlet openings, without being directly connected to inlet openings. The partition wall has at least one through-opening for conducting the coolant from the inlet cavity into the outlet cavity.

Abstract: A component wall of a hot gas component for a gas turbine, which in a double-walled design, has an outer wall which is hotter and an inner wall which is cooler during operation. The interior is divided by partition walls extending between the inner and outer walls. A coolant flows into the interior through inlet openings in the inner wall and out through outlet openings in the outer wall. An inlet cavity is directly connected to at least one of the inlet openings without being directly connected to outlet openings. A second cavity is provided directly next to the inlet cavity. The second cavity is directly connected, as an outlet cavity, only to at least one of the outlet openings, without being directly connected to inlet openings. The partition wall has at least one through-opening for conducting the coolant from the inlet cavity into the outlet cavity.