Additive manufactured flow components with stress-resistant structures

An output manifold for a heat recovery steam generator comprising:

• an annular wall having an interior wall surface defining a flow path for a fluid, the annular wall having a wall circumference, a wall length, and a wall thickness;
• at least one stress region in the annular wall, the at least one stress region including a continuous skin having a skin thickness and defining a portion of the interior wall surface and an additive manufactured mesh adjacent the continuous skin in the direction of the wall thickness, the mesh comprised of structural material and a plurality of voids;
• at least one normative region in the annular wall, the at least one normative region including a normative cross-section in a direction of the wall thickness that has a different structure than the mesh of the at least one stress region;
• and
• wherein the structural material of the mesh includes a plurality of fused geometric nodes of a plurality of sizes and defining the plurality of voids.

An additive manufactured flow component comprising:

• an annular wall having an interior wall surface defining a flow path for a fluid, the annular wall having a wall circumference, a wall length, and a wall thickness, wherein the annular wall includes a sintered metal;
• at least one stress region in the annular wall, the at least one stress region including a continuous skin having a skin thickness and defining a portion of the interior wall surface and an additive manufactured mesh adjacent the continuous skin in the direction of the wall thickness, the mesh comprised of structural material and a plurality of voids;
• at least one normative region in the annular wall, the at least one normative region including a normative cross-section in a direction of the wall thickness that has a different structure than the mesh of the at least one stress region;
• and
• wherein the structural material of the mesh includes a plurality of fused geometric nodes of a plurality of sizes and defining the plurality of voids.