The effect of plastic deformation upon the formation of point defects and defect clusters by electron irradiation was studied in the L12 ordered compounds by means of high-voltage electron microscopy. It was found that defects formed preferentially in lines along Burgers vector directions, and grew into linear chains of clusters during electron irradiation. This was explained in terms of the preferential generation of defects along antiphase boundary tubes in specimens which had been deformed below or above the peak temperature. On the basis of 3-dimensional analyses of the defect distribution, formation of the antiphase boundary tubes was explained with particular regard to super-dislocation motion and the strengthening of L12-ordered compounds.

Irradiation-Induced Defects in Deformed Ni3Ge and Ni3Al Single Crystals. Murakumo, T., Ueta, S., Miyahara, A., Hannuki, T., Sato, A.: Philosophical Magazine A, 2000, 80[4], 893-918