Effect of particle size on functional and mechanical properties of single crystals of iron-based FeNiCoAlNb alloy

It is shown that [001]-single crystals Fe-28%Ni-17%Co-11.5%Al-2.5Nb (at. %) alloy aged at T=973 K, 1−20 hours are observed γ'-phase particle size of 3-25 nm, which give rise to thermoelastic of the γ-α′ martensitic transformation. The effect of size of γ’-phase particle on the critical stress of high temperature phase, the temperature range of superelasticity and the mechanical hysteresis are investigated