Thermoelastic Martensitic Transformations in Single Crystals of FeNiCoAlX(B) Alloys

摘要

Using single crystals of Fe-based disordered alloys (Fe - 28% Ni - 17% Co - 11.5% Al - 2.5% Dyen (0.05% B) (at.%) (X = Ti, Nb(B), (Ti + Nb)B), undergoing thermoelastic gamma-alpha'-martensitic transformations (MTs), it is shown that precipitation of particles of the ordered gamma'-phase in the course of aging at D cent = 973 K for 5 h results in the development of shape memory (SME) and superelasticity (SE) effects. It is experimentally found that variation in chemical composition and size of disperse particles of the gamma'-phase allows controlling both mechanical and functional properties - SME and SE.