Computational design of light and strong high entropy alloys (HEA):Obtainment of an extremely high specific solid solution hardening

Menou, Edern and Tancret, Franck and Toda-Caraballo, Isaac and Ramstein, Gérard and Castany, Philippe and Bertrand, Emmanuel and 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. pp. 120-123. ISSN 1359-6462

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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.

Item Type:
Journal Article
Journal or Publication Title:
Scripta Materialia
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
126674
Deposited By:
Deposited On:
06 Aug 2019 10:20
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Sep 2020 04:29