Two‐Directional TiNi Shape Memory Alloy Film | Zendy

Takagi H. | Zendy; Okano K. | Zendy; Juodkazis S. | Zendy; Matsuo S. | Zendy; Misawa H. | Zendy

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Two‐Directional TiNi Shape Memory Alloy Film

Author(s) -

Takagi H.,

Okano K.,

Juodkazis S.,

Matsuo S.,

Misawa H.

Publication year - 2003

Publication title -

advanced engineering materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.938

H-Index - 114

eISSN - 1527-2648

pISSN - 1438-1656

DOI - 10.1002/adem.200300347

Subject(s) - shape memory alloy , materials science , alloy , austenite , curvature , bending , martensite , metallurgy , sputtering , composite material , diffusionless transformation , thin film , microstructure , geometry , nanotechnology , mathematics

A change from a memorized convex to a concave curvature between 10 °C for the martensitic and 50 °C for the austenitic transition is the important feature of a novel two‐directional shape TiNi memory alloy film fabricated by sputtering. The key to two‐directional actuation is Ti 3 Ni 4 precipitate formation attained by an Ni enrichment (55.6 %) in the alloy. The Figure shows the bending of a strip placed over a steaming cup of tea after 0.1 to 0.4 seconds.

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