Source :
Multidiscipline Modeling in Mat. and Str.
Descriptors :
Deformation twinning , energy criterion , twin band , twin nucleus , intermetallic TiAl
Abstract :
In terms of continuum mechanics a twin is represented by the sudden appearance of a
shear eigenstrain state in a distinct region. The corresponding elastic strain energy, the interface energy
and the energy dissipated due to the irreversible character of the deformation process are investigated.
If the total amount of these energy terms, spent by the twinning process, can be provided by the
interaction energy of an external and/or internal stress state with respect to the twin shear eigenstrain,
then either a deformation twin band or a twin nucleus may appear. Realistic estimations of the
dimensions of deformation twins can be presented. This energetic interpretation of twinning is
experimentally demonstrated for intermetallic TiAl.
Title of Article :
CONTINUUM MECHANICS OF DEFORMATION TWINNING –A REVIEW
Author/Authors :
Franz Dieter Fischer , Thomas Schaden , Fritz Appel , Helmut Clemens
Author/Authors - جزئيات :
