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The peculiarities of atomic ordering in scandium-doped austenitic fecrni alloys

Abstract The kinetics of short-range atomic ordering in austenitic Fe-17 Cr-xNi (x=10-25 wt%) alloys and in Sc-doped alloys has been studied by residual resistivity measurements during isochronal annealing in the temperature range 300-815 K. Dynamics of residual resistivity variations has shown that (i) diffusion in these alloys is observable at temperature above 700 K, (ii) preliminary cold-work deformation as well as doping by Sc atoms forms the disorder atomic structure in the austenitic matrix. It was found that Sc Atoms retard the atomic ordering process and shift it to higher temperatures. The value of temperature shift is increased from 25 to 80 K when the nickel concentration grows up to 25 wt%.