THE MORPHOLOGY CHANGES CAUSED BY THE NONEQUILIBRIUM PHASE-TRANSITION IN IRRADIATED METALLIC SOLID-SOLUTIONS

A new non-equilibrium state of metal materials induced by irradiation has been found in preceding studies of the authors by the method of X- ray investigation. Now the morphology peculiarities accompanying this transition are described. There are three stages and three groups of m icrostructures depending on irradiation parameters. These are essentia lly different whether the microstructure corresponds to a state within a specific interval of the transition or out of this interval. There are some signs of microstructures observed which are similar to the st ructural elements in heavily deformed metals, in particular, the rotat ion mode and the appearance of hydrodynamical flow.