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The interaction between dislocations and precipitates plays an important rolein the mechanical behavior of alloys. To provide more insight into the physicsof this interaction, this research analyzes short-range interactions of an edgedislocation with an array of equally-spaced identical precipitates. We use amodified dislocation dynamics approach accounting for penetrable andimpenetrable precipitates. This research quantifies the effects of precipitateresistance on the geometry of the dislocation-precipitation interaction and thelocal distribution of plastic strain near a precipitate. The results show thata precipitate with a higher resistance causes an increase in the maximum valueof dislocation curvature during the bypass. In addition, a higher level ofprecipitate resistance leads to a lower level of plastic deformation. Moreover,we observed a high plastic strain gradient at the interface of non-shearableprecipitates.

Computational analysis of short-range interactions between an edge  dislocation and an array of equally-spaced identical shearable or  non-shearable precipitates