Interactions of interstitials with twin boundaries in body-centred-cubic metals

Abstract

A computer simulation investigation of possible interactions between self interstitials and {112} twin boundaries in body-centred-cubic crystals has been carried out. The work is based on the Johnson J ₀, potential for iron. The results show that there are large binding energies between the favoured 〈110〉- and 〈111〉-split interstitials and both the reflection and isosceles types of twin boundary. It is suggested that interstitial dislocation loops should form preferentially at these boundaries in irradiated b.c.c. materials.