Figure 3
An experimentally observed Σ21 boundary is superimposed onto the [112]Σ21 boundary structure model extracted from the ref.41. This Σ21 boundary was defined to have a [112]/44.42° axis/angle pair, which grain-boundary structure is composed of one structural unit A from Σ1 boundary and two structural unit B from Σ11 boundary. The perfect dislocation having Burgers vector of b1 or b2 or b3 was emitted to bottom grain, while the partial dislocation having Burgers vector of bα or bβ was emitted to the top grain.
