## 2 Materials and Methods  
The G-NiCu30 Nb (Deutsches Institut fur Normung (DIN) 2.4365) material used for this work was supplied by Otto Junker GmbH. The ingot was gas atomized by Nanoval GmbH under argon atmosphere. The powder was generally spherical, as shown in Figure 1a, but with a few satellites, whereas Figure 1b shows an etched powder particle. Particle size analysis by Nanoval GmbH had a d\({}_{50}\) of 27.2 \(\upmu\)m. The nominal compositions (wt.%) of the cast (spectral analysis) and the subsequent gas atomized powder (representative energy-dispersive spectroscopy (EDS) measurements, INCA Oxford INCA X-Sight 7426 system) are tabulated in Table 1 below, showing no significant elemental losses during the atomization. The overall carbon content in the powder was not measured; however, local enrichments were measured by EDS. The Zeiss light optical microscope (LOM) and the Zeiss Gemini Field-Emission Gun (FEG) scanning electron microscope (SEM) were used for all microscopic material characterization. Oxford Instruments Inca X-sight 7426 energy-dispersive spectroscopy (EDS) and electron backscatter diffraction (EBSD) detectors were used for all EDS and EBSD measurements, respectively, while etching was performed for 60 s (80 mL of ethanol + 40 mL of HCL+ 2 g of CuCl\({}_{2}\)). Fraunhofer Institute for Laser Technology's (ILT) laser powder bed fusion (LPBF) Aconity machine (IPG Photonics Ytterbium YLR-200-SM, 200 W laser power, wavelength of 1080 nm, 90 \(\upmu\)m beam diameter) was used for all additive printing. Eight cubes of 10 \(\times\) 10 \(\times\) 10 mm\({}^{3}\) dimensions were LPBF-printed using a bidirectional \(XY\) scanning strategy which turned about at 90\({}^{\circ}\) between each successive layer with a \(Z\) building direction perpendicular to the building platform. A constant laser power of 200 W and layer thickness of 30 \(\upmu\)m \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Material: G-NiCu30 Nb** & \multicolumn{6}{c}{**Nominal Composition (wt.\%)**} \\ \hline  & Ni & Cu & Nb & Fe & Mn & Si & Al \\ \hline Cast & 60.25 & 31.28 & 2.87 & 3.28 & 1.00 & 1.38 & 0.10 \\ \hline Gas atomized powder & 59.39 & 29.89 & 3.87 & 3.68 & 0.99 & 1.65 & 0.53 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Nominal composition (wt.%) of the cast and gas atomized powder. were used. Two hatch distances, 80 \(\upmu\)m and 140 \(\upmu\)m, were chosen along with a varying scanning speed (Vs) between 550 and 1500 mm/s. Using ANSYS Pro image analysis software, the relative densities of the cubes were determined. The relative density of each cube was determined by averaging five optical measurements taken at five different positions. Microhardness was determined using the Buehler MicroMet 5104 equipment both in as-built and in post heat-treated conditions. The measurements were determined from averaging nine different measurements on the plane parallel to the building direction away from the bottom layer near the support structure using a load of 200 g (HV\({}_{0.2}\)). The averaged microhardness of each hatch distance (80 \(\upmu\)m and 140 \(\upmu\)m) print set, along with their respective scanning speeds (1000-1500 mm/s and 550-850 mm/s), was compared to as-cast material. Based on the building parameters of the as-built cubes, the tensile specimens were printed using the following process parameters: laser power (Lp) = 200 W, layer thickness (Ds) = 30 \(\upmu\)m, hatch distance (ys) = 140 \(\upmu\)m, and scanning speed (Vs) = 850 mm/s. Tensile tests were performed at room temperature with the INSTRON 8033 tensile test machine using a crosshead speed of 0.3 mm/min. Six tensile test specimens according to DIN 50125 standard were as-printed and tensile tested (three vertical and three horizontal orientations), while six other as-built tensile specimens also printed according to DIN 50125 standard were post heat treated (PHT) at 1000 \({}^{\circ}\)C for 1 h (three vertical and three horizontal orientations) before the tensile test was performed.