The motion of macro-kinks which joined locked screw dislocations in L12 alloys was examined theoretically. It was shown that, if the macro-kinks were always in equilibrium as the stress increased, those elements of the bowing macro-kink which were close to the screw orientation had a very high probability of forming locks before the unstable configuration, at which the kink could act as a source, was reached. It was therefore concluded that the propagation of dislocations of screw character, via the generation and motion of macro-kinks, was plausible only under dynamic conditions; when the dislocations were moving rapidly.

The Behavior of Macro-Kinks under Stress in the Yield Stress Anomaly of L12 Alloys. P.B.Hirsch: Czechoslovak Journal of Physics, 1995, 45[11], 921-33