Atomistic study of temperature dependence of interaction between screw dislocation and nanosized bcc Cu precipitate in bcc Fe

The effect of temperature on the interaction between a screw dislocation and a nanosized bcc Cu precipitate in bcc Fe is studied by using molecular dynamics simulations. The results have shown temperature dependence in the antitwinning direction, whereby the screw dislocation has bypassed the Cu precipitate by Orowan looping below 200 K, but has sheared the precipitate above 300 K.