"Pseudoelastic Behaviour of Non-Stoichiometric Ti3Sn"

Recently it was reported that intermetallic compound Ti₃Sn exhibits low Young’s modulus and high damping capacity at low frequencies related to the first-order phase transition that takes place slightly above room temperature. The present report is dedicated to the first observation of pseudoelastic behaviour of non-stoichiometric intermetallic compound Ti_75,5Sn_24,5. Recovery of the material was observed using a compression cyclic loading-unloading test and microhardness indentation at room temperature. The stress-strain curve during loading-unloading processes forms pseudoelastic loop with correspondent apparent Young’s modulus about 30GPa while irregular shape of microhardness imprints indicates graphically material’s recovery. Changes in the crystal lattice were also studied using High-temperature X-Ray diffraction with heating in situ. Microstructure of the material and its changes during deformation were observed using TEM and metallography techniques.