The destruction process of large non-truncated stacking fault tetrahedra induced by gliding dislocations was examined using in situ transmission electron microscope straining experiments. Three different destruction processes were observed: a triangular Frank loop remained after collapse (type-1), the whole stacking fault tetrahedron was incorporated into a gliding dislocation as multiple super-jog segments (type-2) and the apex portion of the original stacking fault tetrahedron remained as a smaller stacking fault tetrahedron while the base portion was annihilated (type-3). The remnants of types 1 and 2 destruction processes were similar to those of previous proposed models; indicating that these processes were based upon the dislocation reactions assumed there. On the other hand, the type-3 process, which was entirely different to that in the previous model, was sometimes accompanied by vacancy migration.

Destruction Processes of Large Stacking Fault Tetrahedra Induced by Direct Interaction with Gliding Dislocations. Y.Matsukawa, Y.N.Osetsky, R.E.Stoller, S.J.Zinkle: Journal of Nuclear Materials, 2006, 351[1-3], 285-94