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

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Title: Printability and microstructure of the CoCrFeMnNi high-entropy alloy fabricated by laser powder bed fusion
Authors: Piglione, A
Dovgyy, B
Liu, C
Gourlay, C
Hooper, P
Pham, M
Item Type: Journal Article
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.
Issue Date: 1-Aug-2018
Date of Acceptance: 12-Apr-2018
URI: http://hdl.handle.net/10044/1/59049
DOI: https://dx.doi.org/10.1016/j.matlet.2018.04.052
ISSN: 0167-577X
Publisher: Elsevier
Start Page: 22
End Page: 25
Journal / Book Title: Materials Letters
Volume: 224
Copyright Statement: © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/)
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/K503733/1
Keywords: 09 Engineering
03 Chemical Sciences
Publication Status: Published
Online Publication Date: 2018-04-12
Appears in Collections:Mechanical Engineering
Faculty of Natural Sciences
Faculty of Engineering