  Under plastic flow, multi-element high/medium-entropy alloys (HEAs/MEAs)
commonly exhibit complex intermittent and collective dislocation dynamics owing
to inherent lattice distortion and atomic-level chemical complexities. Using
atomistic simulations, we report on an avalanche study of slowly-driven model
face-centered cubic (fcc) NiCoCrFeMn and NiCoCr chemically complex alloys
aiming for microstructural/topological characterization of associated
dislocation avalanches. The results of our avalanche simulations reveal a close
correspondence between the observed serration features in the stress response
of the deforming HEA/MEA and the incurred slip patterns within the bulk
crystal. We show that such correlations become quite pronounced within the
rate-independent (quasi-static) regime exhibiting scale-free statistics and
critical scaling features as universal signatures of dislocation avalanches.
