Short range ordering and strengthening in CoCrNi medium-entropy alloy

The CrCoNi medium-entropy alloy is found to exhibit higher incipient plastic strength by slow cooling after the homogenization treatment. Compared with water quenching, this strengthening originates from inconsistency of residual stress and short-range orderings (SROs). By deconvolution density distribution critical shear for first pop-in, two peaks corresponding homogeneous heterogeneous dislocation nucleation, respectively, are suggested. Combining mean, areal fraction, activation volume peaks, roles SROs were quantified. Here, SRO that increases nucleation 22.4% 39.9%, negligible 2.1% both. As a result, promotes formation in CrCoNi, which immense benefit elevate its properties.