  We report the synthesis of a bulk nanostructured alloy using the laser-powder
bed fusion process. The equiatomic AlCoCrFeMnNi chemically complex alloy forms
a nanoscale modulated structure, which is homogeneously distributed in the
as-built condition. The nanostructure consisted of Al & Ni-rich ordered (B2)
and Cr & Fe-rich disordered (A2) BCC phases. The two phases form an
interconnected phase-network with coherent interface boundaries.
Atom-probe-tomography and aberration-corrected scanning transmission electron
microscopy analysis of the spatial distribution of the modulated structure
suggests the occurrence of nano-scale spinodal decomposition. These results
introduce a direct synthesis of bulk nanostructured alloys with promising
geometric flexibility.
