The coarsening-grained single-phase face-centered cubic (fcc) medium-entropy alloys (MEAs) normally exhibit insufficient strength for some engineering applications. Here, superior mechanical properties with ultimate tensile strength of 1.6 GPa and fracture strain of 13.1% at ambient temperature have been achieved in a (CoCrNi)₉₄Ti₃Al₃ MEA by carefully architecting the multi-scale heterogeneous structures. Electron microscopy characterization indicates that the superior mechanical properties mainly originated from the favorable heterogeneous fcc matrix (1–40 µm) and coherent spherical γ' precipitate (10–100 nm), together with a high number density of crystalline defects (2–10 nm), including dislocations, small stacking faults, Lomer–Cottrell locks, and ultrafine deformation twins.

对于某些工程应用，粗晶单相面心立方 (fcc) 中熵合金 (MEA) 通常表现出不足的强度。在这里，通过仔细构建多尺度异质结构，在 (CoCrNi) ₉₄ Ti ₃ Al ₃ MEA中实现了优异的机械性能，在环境温度下具有 1.6 GPa 的极限抗拉强度和 13.1% 的断裂应变。电子显微镜表征表明，优异的机械性能主要源于有利的异质 fcc 基体 (1-40 µm) 和相干球形γ'析出物（10-100 nm），以及大量晶体缺陷（2-10 nm），包括位错、小的堆垛层错、Lomer-Cottrell 锁和超细变形孪晶。