Crystallography and Interfacial Free Energy of Noncoherent Twin Boundaries in Copper

Abstract

The crystallography and interfacial free energy of noncoherent twin boundaries in copper have been investigated. It is found that the noncoherent twin boundary is approximately parallel to a {113} plane of one crystal and to a {335} plane of the other. The ratio of the interfacial free energy of noncoherent twin boundaries to the average grain boundary free energy in copper is found to be 0.80±0.015. Two measurements by a second method confirm the magnitude of this value.