Surface characteristics, nano-indentation and corrosion behavior of Nb implanted NiTi alloy

► Nb implantation is able to form Nb2O5/TiO2 nano-film on NiTi alloy. ► Nb implantation decreases the Nano-hardness and Young's modulus of NiTi. ► Corrosion resistance behavior of NiTi is improved by Nb2O5/TiO2 nano-film. ► A moderate incident dose or current causes better corrosion resistance ability.