A study of the interaction between irradiation induced-defect and a line dislocation in bcc-iron

We evaluate the interaction between a line edge dislocation and a self-interstitial atom cluster in α-iron by the molecular dynamics (MD) calculation. When the distance between the slip plane of the dislocation and the cluster centroid is more than twice as large as the cluster radius and the distance between the slip plane and the nearest part of the cluster is more than 1 nm, the results obtained by MD simulation agree well with that by the dislocation theory. The calculation temperature does not affect the stable position of the cluster near the dislocation. We discuss the difference in MD and the dislocation theory and the limitation of the infinitesimal small cluster approximation.