Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Computational design of light and strong high entropy alloys (HEA)
T2 - Obtainment of an extremely high specific solid solution hardening
AU - Menou, Edern
AU - Tancret, Franck
AU - Toda-Caraballo, Isaac
AU - Ramstein, Gérard
AU - Castany, Philippe
AU - Bertrand, Emmanuel
AU - Gautier, Nicolas
AU - Rivera Díaz-Del-Castillo, Pedro Eduardo Jose
PY - 2018/11
Y1 - 2018/11
N2 - 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.
AB - 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.
KW - Phase diagram
KW - Modeling
KW - Simulation
KW - Thermodynamics
KW - Machine learning
U2 - 10.1016/j.scriptamat.2018.07.024
DO - 10.1016/j.scriptamat.2018.07.024
M3 - Journal article
VL - 156
SP - 120
EP - 123
JO - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
ER -