Solid, shape recovered “bulk” Nitinol: Part I-Tension-compression asymmetry

► Solid, polycrystalline NiTi has up to 3.5% strain recovery deformed in compression. ► Compressive σ-ɛ curves have lower recoverable strains, higher transformation slopes. ► 5% compression material setting results in the maximum shape recovery. ► The strain ratio associated with martensite transformation is 1:57. ► At 22 °C, NiTi has a UTS is 2219 MPa and a uniform elongation of 30%.