| Abstract Scope |
One of the greatest pioneers in physical metallurgy, J.W. Christian stated that “a deformation which is physically significant implies a one-to-one correspondence between vectors in the two lattices. Each vector in one lattice may be associated unambiguously with a ‘corresponding’ vector of the other lattice into which it is converted by the transformation”. This important statement implies that, during migration of a solid-state interface, whether it is a grain boundary (GB), interphase boundary or a twin boundary, a unique lattice correspondence should exist. In this work, lattice correspondences in major twinning modes of hexagonal close-packed metals are calculated by atomistic simulations. The results are compared with experimental characterization of grain boundaries and interphase boundaries. It is shown that formation of GBs and interphase boundaries are closely related to these lattice correspondences. Hence, an inherent connection between deformation twinning, phase transformation, and GB formation and migration can be established. |