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Bulk nanostructured AlCoCrFeMnNi chemically complex alloy synthesized by laser-powder bed fusion

Jung, H.Y. and Peter, N.J. and Gärtner, E. and Dehm, G. and Uhlenwinkel, V. and Jägle, E.A.

ADDITIVE MANUFACTURING
Volume: 35 Pages:
DOI: 10.1016/j.addma.2020.101337
Published: 2020

Abstract
We report the synthesis of a bulk nanostructured alloy using laser-powder bed fusion. The equiatomic AlCoCrFeMnNi chemically complex alloy forms a nanoscale modulated structure, which is homogeneously distributed in the as-built condition. The nanostructure consists of Al & Ni-rich ordered and Cr & Fe-rich disordered 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. © 2020 Elsevier B.V.

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