APPLICABILITY OF THE BAIN, KURDJUMOV-SACHS, NISHIYAMA-WASSERMANN, GRENINGER-TROIANO AND PITSCH RELATIONS TO TRANSFORMATIONS IN THE GIBEON METEORITE AND IN A TRIP STEEL

摘要

The pole figure representations of the reflections associated with five commonly considered correspondence relations are described. These are shown to be clustered around the three Bain {100} reflections associated with the three Bain variants. The locations of the (minimum angle) rotation axes in Rodrigues-Frank space are also illustrated. Examples taken from both diffusive (the Gibeon meteorite) and displacive (bainite formation in a TRIP steel) transformations are used to illustrate the relative importance of the five sets of correspondence conditions. It is demonstrated that the Bain relation is never observed and that the Pitsch and "inverse G-T" (Greninger-Troiano) transformations are relatively rare in these materials. By contrast, the experimental results are continuously distributed from the K-S (Kurdjumov-Sachs), through the G-T, to the N-W (Nishiyama-Wassermann) positions and do not seem to favor any single one of these three relations.