Accelerated design eutectic-high-entropy-alloys using simple empirical rules

Abstract

Eutectic high entropy alloys (EHEAs) have attracted wide attention in the metallic materials due to the good castability, phase stability, as well as the excellent strength-ductility synergy. How to design more eutectic compositions in a certain high entropy alloy system remains to be challenging. Here, we established the simple empirical mathematical rules to accelerate design the AlCoaCrbFecNid EHEAs. The mathematical formulas are: d ≥ 1.0, 3.89a + 4.27b + 4.17c + 3.87d ≈ 20.45, a − 2b + 2d ˃ 2.0, and (a + d) ˃ (b + c). On the basis, eight FCC/B2-type near-EHEAs were obtained by experimental verification.