Fig. 1

Magnetometric curves of cooling and heating of the alloy in the initial state (1) and after 100 γ-α-γ transformations (2). The alloy, wherein a weak stabilization of austenite with respect to the subsequent forward γ-α transformation was observed, has been investigated to reveal the evolution of the structure refinement. During repetitive γ-α-γ transformations, accumulation and interaction of stacking faults had been occurred in austenite that resulted in the formation of additional sub-boundaries and appearance of highly dispersed fragments. Magnetometry showed that amount of martensite in the alloy studied was reduced by only 8% after multiple γ-α-γ transformation cycles