The additive manufacture processing and machinability of CrMnFeCoNi high entropy alloy
The additive manufacture processing and machinability of CrMnFeCoNi high entropy alloy
We report a study of the machining characteristics of a High Entropy Alloy, CrMnFeCoNi (Cantor's Alloy). The alloy in powder form is first used to Additively Manufacture a relatively large block by Selective Laser Melting. This block provides the material for a parametric study of the machining response in comparison to a reference AISI 304L stainless steel, both in terms of the surface finish obtained for different machining parameters, and the tool wear. It was found that the CrMnFeCoNi alloy has in fact better machinability than the AISI 304L stainless steel, and indications from the machined surface are that this is due to the plastic behaviour in this alloy, with good, but not excessive, strength, and significant ductility. While this behaviour may not be replicated in all HEAs, it shows that alloys with good machinability can be found in this class, and that early assessment of machinability can help guide alloy design activities.
High entropy alloys (HEAs), Complex concentrated alloys (CCAs), Additive manufacture, Machining, CrMnFeCoNi
Litwa, Przemyslaw
8b5d380e-9fe6-42bf-af27-2174c65e882a
Hernandez-Nava, Everth
18b5e995-b0ee-4d95-8c49-b18a52ff5a98
Guan, Dikai
d20c4acc-342a-43fa-a204-7283f0cc33bf
Goodall, Russell
ac77b009-8e5e-404f-b083-53aaf5850500
Wika, Krystian K.
cbfe9528-38d6-42c8-8871-5026cbb2f4a3
15 January 2021
Litwa, Przemyslaw
8b5d380e-9fe6-42bf-af27-2174c65e882a
Hernandez-Nava, Everth
18b5e995-b0ee-4d95-8c49-b18a52ff5a98
Guan, Dikai
d20c4acc-342a-43fa-a204-7283f0cc33bf
Goodall, Russell
ac77b009-8e5e-404f-b083-53aaf5850500
Wika, Krystian K.
cbfe9528-38d6-42c8-8871-5026cbb2f4a3
Litwa, Przemyslaw, Hernandez-Nava, Everth, Guan, Dikai, Goodall, Russell and Wika, Krystian K.
(2021)
The additive manufacture processing and machinability of CrMnFeCoNi high entropy alloy.
Materials & Design, 198.
(doi:10.1016/j.matdes.2020.109380).
Abstract
We report a study of the machining characteristics of a High Entropy Alloy, CrMnFeCoNi (Cantor's Alloy). The alloy in powder form is first used to Additively Manufacture a relatively large block by Selective Laser Melting. This block provides the material for a parametric study of the machining response in comparison to a reference AISI 304L stainless steel, both in terms of the surface finish obtained for different machining parameters, and the tool wear. It was found that the CrMnFeCoNi alloy has in fact better machinability than the AISI 304L stainless steel, and indications from the machined surface are that this is due to the plastic behaviour in this alloy, with good, but not excessive, strength, and significant ductility. While this behaviour may not be replicated in all HEAs, it shows that alloys with good machinability can be found in this class, and that early assessment of machinability can help guide alloy design activities.
Text
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More information
Accepted/In Press date: 2 December 2020
e-pub ahead of print date: 5 December 2020
Published date: 15 January 2021
Keywords:
High entropy alloys (HEAs), Complex concentrated alloys (CCAs), Additive manufacture, Machining, CrMnFeCoNi
Identifiers
Local EPrints ID: 474211
URI: http://eprints.soton.ac.uk/id/eprint/474211
ISSN: 0264-1275
PURE UUID: c7b25316-24bf-40b8-abeb-4f83cadee060
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Date deposited: 15 Feb 2023 17:53
Last modified: 17 Mar 2024 04:17
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Contributors
Author:
Przemyslaw Litwa
Author:
Everth Hernandez-Nava
Author:
Dikai Guan
Author:
Russell Goodall
Author:
Krystian K. Wika
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