LAUSR

Abstract This work presents a study of tensile behavior for a Ti-28 at.%Ta alloy with low modulus and remarkable superelasticity. The Ti-28Ta alloy was firstly fabricated by melting the Ti/Ta powder mixture, followed by hot swaging. The microstructure and tensile behavior were examined by X-ray diffraction, optical microscopy, scanning electron microscopy, transmission electron microscopy and digital image correlation. The results show that the as-fabricated Ti-28Ta alloy is consisted of β with minor nano-sized martensitic α″ and athermal ω. The yield strength and tensile strength of the Ti-28Ta alloy are 549.4 ± 17.0 and 673.8 ± 78.2 MPa, while its fracture elongation and Young's modulus reach to 28.55 ± 2.19% and 89.9 ± 6.1 GPa, respectively. The static and cyclic stress–strain tensile behaviors of the Ti-28Ta alloy were investigated. The results demonstrate that the Ti-28Ta alloy exhibits ductile and transgranular fracture behavior, excellent superelasticity and remarkable ductility.