The possible role of partial dislocations in facilitating transformations of the Nishiyama-Wassermann type

By analogy with the role of perfect dislocations in facilitating Kurdjumov-Sachs type transformations, it is proposed that partial dislocations may be responsible for Nishiyama-Wassermann transformations. Such an interpretation can account for the presence of both “positive slip” and “negative slip” variants within individual grains, a hitherto unexplained phenomenon.