Fig. 1
From: A continuum model for slip transfer at grain boundaries
Burgers circuit \(C=U^+\cup R^+\cup R^-\cup B^-\cup L^-\cup L^+\) across an interface I separating the body \(\mathcal {B}\) into domains \(\mathcal {B}^-\), \(\mathcal {B}^+\). \(\mathbf { l}\) is the unit tangent to curve \(\mathcal {C}\), \(\mathbf { n}\) is the unit normal to interface I, and \({\varvec{\tau }}=\mathbf { n}\times \mathbf { l}\) the “tangent normal” to the bounded surface S and curve \(\mathcal {C}\)