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

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arxiv 2004.02309 v1 pith:HDBYEPUL submitted 2020-04-05 cond-mat.mtrl-sci

Hyo Yun Jung , Nicolas J. Peter , Eric Gärtner , Gerhard Dehm , Volker Uhlenwinkel , Eric A. Jägle This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords alloybulknanostructuredalcocrfemnnichemicallycomplexfusionlaser-powder
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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.

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