Ti-Ni-Cu高成形性形状記憶合金を用いた折りたたみ可能な管形状の製作

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  • Fabrication of a foldable tube shape using Ti-Ni-Cu high formable shape memory alloy

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<p>Ti-Ni-Cu high formable shape memory alloys (HFSMAs) show the characteristics of thin film metallic glasses (TFMGs) when the as-sputtered deposited samples and show the characteristics of the shape memory alloys after crystallization. Conventional Ti-Ni based SMAs show poor workability. On the other hand, the HFSMAs show excellent workability by utilizing the viscous flow in the supercooled liquid region (SCLR). In this study, we demonstrated to fabricate HFSMAs foldable tube structures for the medical application such as the stent or the sheath portion of the forceps. The Ti49Ni41Cu10 (at.%) TFMG samples were fabricated by a r.f. magnetron sputtering system. The Ti49Ni41Cu10 HFSMAs crystallized at 773 K-3.6ks exhibited a martensitic transformation temperature near body temperature. We fabricated the foldable tube shape by the following processes. Ti49Ni41Cu10 TFMG flat samples were deformed into wave shape by jig in the SCLR. And then, waved samples were also deformed into circular shape by viscous flow. For produce of tube shape, each edge of wave samples was also bonded at 623 K and 648 K by viscous flow. Finally, a foldable tube shape was annealed at 773 K for 3.6 ks, and then we obtained SMA foldable tube shapes. These tube showed shape memory effect and superelastic properties.</p>

収録刊行物

  • 年次大会

    年次大会 2018 (0), J2220202-, 2018

    一般社団法人 日本機械学会

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