It was noted that, in γ-phase samples which were deformed at room temperature in single slip, prismatic loops were often organized into a staircase-like configuration (strings). Their generation by cross-slip was facilitated by the tendency of dislocations to form screw locks. It was shown here that strings could be encountered in almost any crystal, provided that the 2 impinging dislocations exhibited significantly different velocities. The Tetelman cross-slip annihilation mechanism for crossed dislocations was re-considered here and was shown to evolve into a significantly distinct configuration from that originally predicted.

Formation of Prismatic Loop Alignments in Crystals Deformed in Single Slip. P.Veyssière, F.Grégori: Philosophical Magazine Letters, 2001, 81[12], 795-801