Deformation autowaves in nitrogen-doped gamma-Fe single crystals

Experimental data on the evolution of macrodeformation fields of single-cry stal samples of austenitic chromium-nickel steel with a superequilibrium ni trogen content under tension are analyzed on the basis of a model of autowa ve plastic flow. The conditions for the appearance and observation of diffe rent types of autowave deformation structures are established; such structu res include a solitary front, a traveling autowave, and a stationary dissip ative structure and are determined by the crystal-geometry of deformation a nd by the nitrogen concentration in the material. It is shown that a one-to -one correspondence exists between the type of deformation autowave and the stage of the plastic flow curve of the material. (C) 1999 American Institu te of Physics.