Mingyu Gong, John P. Hirth, Yue Liu, et al. Interface structures and twinning mechanisms of twins in hexagonal metals[J]. Materials Research Letters, 2017, 5(7): 449-464.
DOI:
Mingyu Gong, John P. Hirth, Yue Liu, et al. Interface structures and twinning mechanisms of twins in hexagonal metals[J]. Materials Research Letters, 2017, 5(7): 449-464.DOI: 10.1080/21663831.2017.1336496.
Interface structures and twinning mechanisms of twins in hexagonal metals
BSTRACTA controversy concerning the description of twinning
whether it is shear-shuffle or pure glide-shuffle or pure shuffle
has developed. There is disagreement about the interpretation of transmission electron microscopic observations
atomistic simulations and theories for twin growth. In this article
we highlight the atomic-level
characteristic
equilibrium and non-equilibrium boundaries and corresponding boundary defects associated with the three-dimensional ‘normal’
‘forward’ and ‘lateral’ propagation of growth/annealing and deformation twins. Although deformation twin boundaries (TBs) after recovery exhibit some similarity to growth/annealing TBs because of the plastic accommodation of stress fields
there are important distinctions among them. These distinctions distinguish among the mechanisms of twin growth and resolve the controversy. In addition
a new type of disconnection
a glide disclination
is described for twinning. Synchroshear
seldom considered
is shown to be a likely mechanism for twinning.
Abstract
BSTRACTA controversy concerning the description of twinning
whether it is shear-shuffle or pure glide-shuffle or pure shuffle
has developed. There is disagreement about the interpretation of transmission electron microscopic observations
atomistic simulations and theories for twin growth. In this article
we highlight the atomic-level
characteristic
equilibrium and non-equilibrium boundaries and corresponding boundary defects associated with the three-dimensional ‘normal’
‘forward’ and ‘lateral’ propagation of growth/annealing and deformation twins. Although deformation twin boundaries (TBs) after recovery exhibit some similarity to growth/annealing TBs because of the plastic accommodation of stress fields
there are important distinctions among them. These distinctions distinguish among the mechanisms of twin growth and resolve the controversy. In addition