Superb strength and ductility balance of a Co-free medium-entropy alloy with dual heterogeneous structures

In present work, we successfully fabricated a novel Co-free non-equiatomic Ni46Cr23Fe23Al4Ti4 medium-entropy alloy with dual heterogeneous structures, i.e. three-levels grain structures and heterogeneous L12 precipitates. Experimental results revealed the dual heterogeneous structures lead to remarkable strength-ductility synergy properties in this Co-free medium-entropy alloy, showing high yield strength and ultimate tensile strength of ~1203...