Fig. 6
Nanoscale segment detrapping in random solid solution of NiCoCr. a Dislocation line morphology evolution under a shear stress of 50 MPa at 300 K. The several swept areas are highlighted in red. b Correlation between nanoscale segment detrapping events and spatial deviations from chemical disorder. Atoms are colored according to the coarse-grained \(\alpha _{{\mathrm{CoCr}}}^1\); darker color means stronger Cobalt-Chromium (Co–Cr) short-range-order (more negative \(\alpha _{{\mathrm{CoCr}}}^1\)). The swept areas in a are now outlined in green. These activated nanoscale segments are seen to detrap from some of the local hard regions that have stronger Co–Cr local chemical ordering (LCO) (as denoted by the arrows) and then propagate into local regions without such chemical order. It is not expected that our specific loading conditions within the short simulation period would be able to activate all the segments at LCO trapping sites. For some of the regions with weak Co–Cr LCO along the dislocation line, thermal activation is expected to have already moved those segments, producing a wavy dislocation line before loading, when the sample was first relaxed at 300 K for 100 ps. Continued bow-out increasing curvatures is limited by the line tension
