Printability and microstructure of the CoCrFeMnNi high-entropy alloy fabricated by laser powder bed fusion

By Alessandro Piglione, Bogdan Dovgyy, C. Liu, C. Gourlay, Paul A. Hooper, M. Pham. Materials letters (General ed.), 2018

173 citations recorded by the source corpus.

Abstract The CoCrFeMnNi high-entropy alloy is a promising candidate for metal additive manufacturing. In this study, single-layer and multi-layer builds were produced by laser powder bed fusion to study microstructure formation in rapid cooling and its evolution during repeated metal deposition. CoCrFeMnNi showed good printability with high consolidation and uniform high hardness. It is shown that microstructure in the printed alloy is governed by epitaxial growth and competitive grain growth. As a consequence, a bi-directional scanning pattern without rotation in subsequent layers generates a dominant alternating sequence of two crystal orientations.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/44d906e2d0eede4d34626c7a970ce6a4cafa4bde

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Citations in the corpus

High-entropy alloys fabricated via powder metallurgy. A critical review (2019, methodology): “In many works [51,89,113,130,135,137] where the shaping method is an AM technique, it is important to analyse the effect”