Additive manufacturing has gained vast interest in e.g., aeronautical industry. The large number of superalloys available in powder form has enabled the utilization of the technology for hot gas turbine parts, leading to ground breaking design changes, in fuselage parts of large aircraft, and turbines.

Different lattice truss structures were manufactured with the SLM process in parallel with solid SLM bars were produced. Hollow rectangular tubes and composites of tubes with an interior of lattice truss structures were also manufactured. Hot rolled material of Hastelloy X was included for reference. Mechanical testing was performed in tension showing that the SLM material is highly anisotropic and that the material has many advantages compared to the traditionally manufactured Hastelloy X alloy. Tests also show that fracture is promoted along certain planes in the lattice truss structure.

lattice truss structures were analysed using digital imaging. At small deformations, the deformation in both the lattice and hybrid specimen is homogeneous. The deformation at onset of failure in the hybrid test bar is mainly a shearing of the lattice struts along a preferred plane, while the deformation map for the hybrid material still shows a planar deformation front perpendicular to the loading direction.