The migration of a grain boundary system with ridges of the first order was studied. A theory of steady-state motion of a grain boundary half-loop with facets and ridges was elaborated. The shape and properties of a moving grain boundary which contains additional structural elements (curved segments, facets and ridges of the first order) were addressed. The major kinetic parameters (mobility and its activation enthalpy) for a so-called rough-to-rough grain boundary ridge of the first order were measured. It was shown that the steady-state motion of a boundary half-loop with facets and ridges complied with the principle of maximum rate of free energy dissipation.

Effect of a First-Order Ridge on Grain Boundary Motion in Zn. V.G.Sursaeva, G.Gottstein, L.S.Shvindlerman: Acta Materialia, 2011, 59[2], 623-9