In face-centered cubic crystals, the stress-strain curves of <111> crystals were remarkably insensitive to dynamic recovery compared to other orientations. This effect was attested by several early experimental studies on Cu, Al and Ag crystals. The inhibition of dynamic recovery was attributed to a reduction in the rate of annihilation of screw dislocations. The underlying mechanisms were investigated in terms of the reversal of the direction of the resolved stress in the cross-slip plane, which occurred when going from <001> to <111> orientations. Two distinct processes governing dynamic recovery in <111> crystals, acute cross-slip and backward annihilation, were examined. The second process arose because screw dislocation annihilation occurred along the direction opposite to that of the resolved applied stress in the cross-slip plane. It was concluded that, except possibly in Al, backward annihilation was always responsible for the inhibition of dynamic recovery in <111> crystals.

Inhibited Dynamic Recovery and Screw Dislocation Annihilation in Multiple Slip of FCC Single Crystals. L.P.Kubin, B.Devincre, T.Hoc: Philosophical Magazine, 2006, 86[25-26], 4023-36