Shape memory effect and superelasticity in high-strength FeNiCoAlTi single crystals hardened by nanoparticles

For [001]-oriented single crystals of Fe-28Ni-17Co-11.5Al-2.5Ti (at %) alloy in tension, it was shown that particles of the γ’-phase with a size of 4–6 nm lead to the appearance of superelasticity, with a strain of eSE=4.5% and a shape memory effect of eSME=5.9%. Increasing the particle size to 10–12 nm reduces eSE to 3.6% and eSME to 3.5%. The paper discusses the causes of the influence of particle size on the reversible strain.