Co-zone {1¯012} Twin Interaction in Magnesium Single Crystal

Twin–twin interactions in magnesium

“…The boundary plane of TTB A bonds the prismatic planes in the two twins, as being referred to as PP. These structures have been examined recently using atomistic simulations in Mg [3]. The Burgers vector of the boundary dislocations is perpendicular to the TTB plane (Fig.…”

“…In addition, the migration of a PB boundary can result in the emission of partial dislocations on the basal plane, forming stacking faults as evidenced in high resolution TEM [22]. These microstructural features can be related to twinning-induced hardening [3].…”

“…Microstructures in association with twin-twin interactions were found to correlate with mechanical hardening [36][37][38]. Yu et al [3] observed that twin-twin junctions resulting from twin-twin interactions could retard detwinning. The retardation behavior was ascribed to the unfavorable dissociation of twin-twin boundary (TTB) dislocations.…”

“…As a consequence, twinning and detwinning commonly play a critical role during plastic deformation of polycrystalline aggregates. Twinning/detwinning has been characterized using in situ meso-and macro-scale techniques such as optical microscopy [1][2][3], acoustic emission [4,5] and neutron diffraction [6,7]. In parallel, materials modeling tools at meso-and macro-scales have been developed to quantitatively simulate the contribution of twinning/detwinning to plastic deformation and texture evolution [8][9][10][11][12][13][14].…”

Interface structures and twinning mechanisms of twins in hexagonal metals

“…This is equivalent to separately considering the displacements of the pure step component and those of the dislocation and then adding them. This method has been programmed for simulations of dislocations and twins in face-centered cubic (fcc) and body-centered cubic structures [55,56], and extended for dislocations and twins in hcp structure [57]. After a TD glides, remote atoms above and below the shear plane experience a relative displacement of b t .…”