結晶粒界三重線における変形不適合の回位モデル

Abstract

The geometrical concept of Volterra's disclination is applied to model the inhomogeneous deformation that occurs at the triple junction of grain boundaries in deformed polycrystal. It is shown that even though the deformation is restricted to maintain the strain compatibility on the three grain boundaries meeting at the triple junction, the misfit in the dihedral angles of the three grains would occur. The angular misfit gives the angle of the equivalent disclination that is accompanied by a logarithmic stress singularity at the origin, which is similar to the stress concentration at the triple junction in deformed tricrystals.