抄録
Superelastic properties of Ni-free Ti-Mo-Sn shape memory alloys (SMAs) were investigated using tensile testing. The solution-treated Ti-Mo-Sn alloys showed a recoverable strain of over 3%, while the alloy heat treated at around 923 K exhibited a high tensile strength of over 1000 MPa. Based of those results, a new type of guidewire with functionally graded properties from the tip to the end was developed using Ti-Mo-Sn SMA core wire. This guidewire is expected to show excellent pushability and torquability superior to those of stainless steel and Ti-Ni guidewires. In addition, Ti-Mo-Sn tubes, which are expected to be used for metallic catheters, were fabricated. The superelastic properties of those tubes are also reported.
