Coupled Strengthening Effects by Lattice Distortion, Local Chemical Ordering, and Nanoprecipitates in Medium-Entropy Alloys

Extraordinary mechanical properties can be achieved in high-entropy alloys (HEAs) or medium-entropy (MEAs) with nanoprecipitates. In the present study, extra coupled strengthening effects by lattice distortion, local chemical ordering, and nanoprecipitates HEAs MEAs have been systematically investigated large-scale molecular dynamics simulations. The moving of dislocation slowed down, line shows a wavy configuration due to distortion resulting strengthening. degree increases sliding velocity decreases increasing degrees ordering. It is clearly indicated that moves via nanoscale segment detrapping mechanism roughened pathways for activated segments are observed easier detrap from regions stronger Co-Cr ordering then propagate into without such These characteristics delay unpinning process nanoprecipitates; thus, effect has revealed compared pure Orowan’s