Selective laser melting of Al0.3CoCrFeNi high-entropy alloy: printability, microstructure, and mechanical properties

Florian Peyrouzet (1, 2) , Dorian Hachet (3) , Romain Soulas (1) , Christelle Navone (1) , Stephane Godet (3) , Stéphane Gorsse (2)

1 LITEN - Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 ULB - Université libre de Bruxelles

Al0.3CoCrFeNi high-entropy alloy (HEA) was additively manufactured by powder-bed selective laser melting (SLM) with emphasis on its microstructure and tensile properties. Al0.3CoCrFeNi showed excellent printability, enabling fabrication of fully dense products. The microstructure of the SLM as-built HEA consisted of a single-phase disordered face-centered cubic solid solution with fine columnar grains elongated along the build direction. The characteristic features of the as-built microstructure were a <110> fiber texture aligned toward the build direction and a large dislocation density. As a consequence, printed Al0.3CoCrFeNi HEA exhibited superior tensile strength in comparison with as-cast or wrought counterparts.

Domaines: Matériaux

Florian Peyrouzet, Dorian Hachet, Romain Soulas, Christelle Navone, Stephane Godet, et al.. Selective laser melting of Al0.3CoCrFeNi high-entropy alloy: printability, microstructure, and mechanical properties. JOM Journal of the Minerals, Metals and Materials Society, 2019, 71 (10), pp.3443-3451. ⟨10.1007/s11837-019-03715-1⟩. ⟨hal-02301343⟩