The structure of the Σ3<110>{111} lateral twin boundary in W was studied by using molecular static simulations. Two distinct boundary structures were found to be stable or metastable in the considered models. Multi-layer oscillatory relaxation profiles were observed for the internal energy and local boundary dilatation. It was shown that the resultant structures were broad, and that alternating atomic planes in the immediate vicinity of the Σ3<110>{111} twin boundary could coalesce to form atomic planes with an hexagonal-close-packed structure. A description of the incoherent twin boundary, as being a rigid ω-phase sandwich, accounted almost entirely for the atomic configuration found.

The ω-Structure of the Lateral Twin Boundary in Tungsten. I.M.Mikhailovskij, N.Wanderka, V.A.Ksenofontov, T.I.Mazilova, E.V.Sadanov, A.A.Mazilov: Philosophical Magazine Letters, 2007, 87[10], 743-50