The effects of twins on the large strain deformation and fracture of hexagonal close packed crystalline materials

One of the objectives of this paper is to investigate how dislocation density incompatibilities between twins and the parent matrix affects crack growth. The figure below show how the maximum dislocation occur on different planes for the twin and the matrix. The Immobile dislocation density activity is for the pyramidal (11¯01¯)[1¯21¯3¯ twin slip system.261