While extensive attention has been given to evaluating the additive manufacturing (AM) of Inconel alloys 718 and 625, the energy and transport segments' interest in AM-superalloys restricts itself not only to these materials, since e.g. more than one polycrystalline alloy composes a turbine engine. There is also scientific value in researching the behaviour of alloys with different reinforcement phases, thus, with the intention of expanding our understanding of additively manufacturing superalloys, the influence of laser-AM in the processing of a polycrystalline γ'-reinforced nickel superalloy, Inconel X-750, is described. We report the effect of laser power and scan speed in the crystallography and microstructure of samples produced by Powder Bed Fusion of Metals using a Laser Beam (PBF-LB/M). A description of this material parameterization is novel.

Findings were made regarding the phases precipitated during heat treatment, while the relation of the process parameters to the amount of geometric necessary dislocations, grain size, and crystal anisotropy is also described. Extensive electron backscatter diffraction (EBSD) and X-ray diffractometry analysis were performed for such. Information about the heat-treated material's texture is also provided by Synchrotron crystallography. As the presence of an unexpected intermetallic phase, the η-Phase, was detected after standard AMS 5668 heat treatment, in a likely manner to a previous publication, a new heat treatment which hinders this phase's precipitation was devised. Lastly, initial compressive creep results comparing the effects of samples in two build orientations and under two heat treatment conditions will be also presented.

With this, the project currently being performed around this alloy will be presented, hopefully granting insight into γ'-reinforced polycrystalline AM-alloys and resulting in fruitful exchange among the Symposium's attendees.