Computational design of light and strong high entropy alloys (HEA): obtainment of an extremely high specific solid solution hardening
Computational design of light and strong high entropy alloys (HEA): obtainment of an extremely high specific solid solution hardening
A multi-objective optimisation genetic algorithm combining solid solution hardening (SSH) and thermodynamic modelling (CALPHAD) with data mining is used to design high entropy alloys (HEAs). The approach searches for the best compromise between single-phase stability, SSH and density. Thousands of Pareto-optimal base-centred cubic (BCC) HEAs are designed. Al35Cr35Mn8Mo5Ti17 (at.%) is chosen for experimental validation. The alloy was cast and characterised. Its microstructure consists of large grains of a single disordered solid solution displaying a Vickers hardness of 6.45 GPa (658 HV) and a density below 5.5 g/cm3; uniquely combining exceptional hardness with medium density.
Machine learning, Modeling, Phase diagram, Simulation, Thermodynamics
120-123
Menou, Edern
4524f561-0d13-4f79-83fc-e39e9839b138
Tancret, Franck
63962367-3fff-4cfc-a86c-e56a9fb962d2
Toda-Caraballo, Isaac
104b4ea9-5418-46cc-a90f-db65f449a1fb
Ramstein, Gérard
e96aee83-201c-423c-9e32-c4face398c4f
Castany, Philippe
f8b07d78-ed24-49f1-9113-55065449710f
Bertrand, Emmanuel
a6e4c98a-9dd8-40c7-b167-07a90eaf3251
Gautier, Nicolas
7d936606-b920-4044-9af4-7a62da8eaadd
Rivera Díaz-Del-Castillo, Pedro Eduardo Jose
6e0abc1c-2aee-4a18-badc-bac28e7831e2
23 July 2018
Menou, Edern
4524f561-0d13-4f79-83fc-e39e9839b138
Tancret, Franck
63962367-3fff-4cfc-a86c-e56a9fb962d2
Toda-Caraballo, Isaac
104b4ea9-5418-46cc-a90f-db65f449a1fb
Ramstein, Gérard
e96aee83-201c-423c-9e32-c4face398c4f
Castany, Philippe
f8b07d78-ed24-49f1-9113-55065449710f
Bertrand, Emmanuel
a6e4c98a-9dd8-40c7-b167-07a90eaf3251
Gautier, Nicolas
7d936606-b920-4044-9af4-7a62da8eaadd
Rivera Díaz-Del-Castillo, Pedro Eduardo Jose
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Menou, Edern, Tancret, Franck, Toda-Caraballo, Isaac, Ramstein, Gérard, Castany, Philippe, Bertrand, Emmanuel, Gautier, Nicolas and Rivera Díaz-Del-Castillo, Pedro Eduardo Jose
(2018)
Computational design of light and strong high entropy alloys (HEA): obtainment of an extremely high specific solid solution hardening.
Scripta Materialia, 156, .
(doi:10.1016/j.scriptamat.2018.07.024).
Abstract
A multi-objective optimisation genetic algorithm combining solid solution hardening (SSH) and thermodynamic modelling (CALPHAD) with data mining is used to design high entropy alloys (HEAs). The approach searches for the best compromise between single-phase stability, SSH and density. Thousands of Pareto-optimal base-centred cubic (BCC) HEAs are designed. Al35Cr35Mn8Mo5Ti17 (at.%) is chosen for experimental validation. The alloy was cast and characterised. Its microstructure consists of large grains of a single disordered solid solution displaying a Vickers hardness of 6.45 GPa (658 HV) and a density below 5.5 g/cm3; uniquely combining exceptional hardness with medium density.
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More information
Accepted/In Press date: 18 July 2018
e-pub ahead of print date: 23 July 2018
Published date: 23 July 2018
Keywords:
Machine learning, Modeling, Phase diagram, Simulation, Thermodynamics
Identifiers
Local EPrints ID: 492265
URI: http://eprints.soton.ac.uk/id/eprint/492265
ISSN: 1359-6462
PURE UUID: 030e4ee7-0988-4274-8fd1-9090e4494982
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Date deposited: 23 Jul 2024 16:40
Last modified: 24 Jul 2024 02:07
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Author:
Edern Menou
Author:
Franck Tancret
Author:
Isaac Toda-Caraballo
Author:
Gérard Ramstein
Author:
Philippe Castany
Author:
Emmanuel Bertrand
Author:
Nicolas Gautier
Author:
Pedro Eduardo Jose Rivera Díaz-Del-Castillo
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