Strength-ductility synergy of Al0.1CoCrFeNi high-entropy alloys with gradient hierarchical structures

A new strategy for strengthening Al0.1CoCrFeNi high-entropy alloys (HEAs) is introduced by architecting the gradient hierarchical structures (GHS). The GHS sheets show a dramatic enhancement in tensile yielding strength and acceptable tensile ductility, outperforming the annealed counterpart, owing to extraordinary strain hardening capacity and nanotwinning activity. The yielding strengths of the GHS sheets are higher than the values calculated...