Effect of ordering on the magnitude of volume change and the shape memory effect upon the martensitic transformation in the Fe3Pt alloy

The influence of a heat treatment on the behavior of the volume effect and the degree of shape recovery upon the martensitic transformation for the Fe-24 at % Pt alloy has been studied. It has been found that an increase in the time of annealing at 650°C from 0 to 300 min leads to a continuous decrease in ΔV/V from 1.26% in the quenched condition to 0.987% for τ = 300 min. The characteristic temperatures of the martensitic transformation decrease, and the hysteresis passes through a minimum. The shape memory effect in the heat-treated samples after τ = 40 min achieves 100%.