Effects of precipitates and dislocation loops on the yield stress of irradiated iron.

摘要: Plastic deformation of crystalline materials is governed by the features stress-driven motion dislocations. In case irradiated steels subject to applied stresses, small dislocation loops as well precipitates are known interfere with motion, leading an increased yield stress compared pure crystals. We study combined effect and interstitial glissile [Formula: see text] on iron, using large-scale three-dimensional discrete dynamics simulations. Precipitates included in simulations our recent multi-scale implementation [A. Lehtinen et al., Phys. Rev. E 93 (2016) 013309], where strengths pinning mechanisms determined from molecular we observe dislocations overcoming atypical Orowan mechanism which results pencil-glide screw segments iron. Even if interaction quite different, suggest that relative terms, similar sizes contribute equally multi-slip conditions.