Abstract
Unidirectional recrystallization in cold-swaged Ni alloys was investigated at temperature gradients of 900, 450 and 140 K/cm, and the effects of temperature gradient, transfer rate and solute atoms on recrystallized structures were studied. Though highly elongated grain structures were observed in Ni-Cu alloys above 1 at% Cu at a temperature gradient of 900 K/cm, higher temperature gradients were needed for alloys of lower Cu concentration. The temperature gradient needed for unidirectional grain growth, the maximum transfer rate and the grain size decreased with increasing solute concentration. The kind of solute atom was another important factor and much influenced the recrystallized structures. As quenched interfaces reveals the feature of recrystallization processes, the unidirectional recrystallization technique is expected to be useful for study of recrystallization.
