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A novel lightweight single-phase refractory high-entropy alloy with superior yield strength and hardness developed through data-driven design
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DOI：10.1016/j.ijrmhm.2026.107917.png)
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Abstract
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• BCC Ti30V20Al30Nb10Ta10, with ρmix ≈ 6 g/cm3, achieved the best 1630 MPa compressive yield reported for LW-RHEAs. • BCC Ti30V20Al30Nb10Ta10 has the best density-compressive yield ratio reported for LW-RHEAs. • The alloy design was achieved via NSGA-II under thermodynamic-descriptor constraints and CalPhad simulations. • Design space exceeded 2500 candidate compositions, including the Pareto front, allowing exploration. • Best surrogate machine learning model achieved R2 > 0.9972 and predicted phase constitution for NSGA-II solutions.
Keywords:
Lightweight refractory high entropy alloys
Non-dominated sorting genetic algorithm II
Calphad method
Machine learning
Microstructure and mechanical properties
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