## 1 Introduction  
With advances in the additive manufacturing (AM) of inorganic materials, a variety of efforts to understand the effects of this unique process on structure and properties have been undertaken. Such efforts have led many to question the use of materials designed for traditional wrought processes in AM and research has evolved to study the effects of AM processing on more unusual materials such as intermetallics. Specific work in intermetallics has been focused on materials such as titanium aluminides for high temperature strength, oxidation resistance, and creep resistance in the aerospace industry [1; 2; 3; 4], or nickel titanium intermetallics for shape memory, damping, and biocompatibility for implants in the medical industry [5; 6; 7; 8; 9]. Only a few publications have investigated the potential for the selective laser melting (SLM) of magnetic intermetallics [10; 11; 12; 13].  
[PERSON] et al. [10] investigated the directed energy deposition (DED) of Ni-Fe-V and Ni-Fe-Mo soft magnets from an elemental powder blend. They found these materials exhibited similar saturation limits to traditional materials of similar chemistry, but with much higher coercivity. The difference in coercivity was attributed to microstructural defects such as porosity, unmelted particles, and other impurities, while grain size effects were not considered.  
[PERSON] et al. [11] produced Fe-Ni soft magnets from elemental powders using DED. This work showed incomplete homogenization with chemical segregation along weld boundaries, which was associated with increases in magnetic anisotropy. The AM material also showed a higher magnetic saturation than the elemental powder mixture, but this is likely due to the differences in phases present in pure Fe or Ni as opposed to the intermetallic FeNi\({}_{3}\) since traditionally manufactured FeNi\({}_{3}\) has higher saturation than the AM material produced here. Evaluation of magnetics in various orientations relative to the AM process showed no anisotropy in the results.  
[PERSON] et al. [12] produced Fe-6 Si using SLM. They demonstrated the effects of altered build parameters and heat treatments on magnetic properties and hardness. Higher laser energies tend to drive toward a more highly textured material, which was shown to drive variation in magnetic properties. These changes are associated with the preferred magnetization direction of the crystal structure and its relation to the manufactured texture. Additionally, small grain size from the AM process was identified as a potential cause of reduced magnetic performance.  
[PERSON] et al. [13] developed DED parameters for Fe-Co-1.5V and evaluated mechanical and magnetic properties related to structure in the as-built and ordered states. Results showed a near-random texture in the as-built state with a grain size on the order of 2.0 \(\upmu\)m. The small grain size is attributed to a layer-by-layer reheating from the DED process. After annealing, a bimodal grain distribution was observed with the formation of 200-600-\(\upmu\)m grains surrounded by the smaller grains remaining from the AM process. This abnormal grain growth may be caused by grain pinning of second phases such as oxides or the common (Co,Fe)\({}_{3}\)V precipitate. Magnetic properties in the as-built condition were shown to exhibit a higher level of coercivity with more sheared hysteresis loops, while annealed samples had lower coercivity and higher squareness.  
This work intends to evaluate SLM Hiperco 50A (48.75 wt.% Co, 2.0 wt.% V, remainder Fe) structures and their relationship to mechanical and magnetic properties. This will be done through comparison with accepted relationships for wrought Hiperco 50A. Connections between grain size and mechanical and magnetic properties are explored and deviations of AM material from expected trends are highlighted.