  The formation of basal/prismatic (BP) interfaces accompanying with the
nucleation and growth of a reoriented crystal in Mg single-crystals under
c-axis tension is investigated by molecular dynamics simulations. The BP
interfaces nucleate by shuffling mechanism via local rearrangements of atoms.
Both two-layer disconnections and one-layer disconnections contribute to the
migration of BP interfaces. In a three-dimensional view, the BP interfaces
relatively tend to migrate towards the [1-210] direction rather than the
[-1010]/[0001] direction since the misfit disconnection or misfit dislocation
caused by the accumulation of mismatch along the [-1010] /[0001] direction
impedes the disconnection movement. The BP interfaces can transform to the
{10-12} twin boundary (TB) and vice versa. While the process from BP interface
to TB is described as the linear pile-up of interface disconnections, the versa
transformation is proposed as the upright pile-up process. Both BP
transformation and {10-12} twinning can efficiently accommodate the strain
along the c-axis, and the conjugate BP interfaces and {10-12} TBs account for
the large deviations of twin interfaces from the {10-12} twin plane.
