INFINITESIMAL DEFORMATION APPROACH OF THE PHENOMENOLOGICAL CRYSTALLOGRAPHIC THEORY OF MARTENSITIC TRANSFORMATIONS

The infinitesimal-deformation approach has been used to reformulate the phenomenological crystallographic theory of martensitic transformations. Simple analytical solutions for the habit plane orientation, the direction and magnitude of the lattice invariant shear, the orientation relationship between parent and product phases, etc. were derived for the cubic to tetragonal transformation. The derived results were numerically compared with those obtained from the original phenomenological theory by taking the cubic to tetragonal transformation in a zirconia alloy as an example. The expected magnitude of the differences in solutions between the present and phenomenological crystallographic analyses was also discussed. © 1990 Chapman and Hall Ltd.