Defect recovery and long-range ordering during the isochronal annealing of cold-rolled 0.19at%B-doped material were studied by using resistometry, transmission electron microscopic and micro-hardness methods. It was found that cold-rolling caused a decrease in the degree of long-range order, and an effective increase in the mobility of vacancies. Long-range ordering during isochronal annealing occurred in qualitatively the same manner as in as-rolled or homogenized samples. Transmission electron microscopic observations revealed 2 stages of defect recovery. Firstly, superlattice intrinsic stacking faults almost completely recovered at temperatures ranging from 443 to 700K. This showed that they were bounded by dislocations of opposite sign. Secondly, the recovery of antiphase boundary dissociated superlattice dislocations occurred via the annihilation or dipoles over the entire temperature regime; finally leading to a loss of all dislocations at 1273K.

W.Pfeiler, R.Kozubski, H.P.Karnthaler, C.Rentenberger: Acta Materialia, 1996, 44[4], 1563-71