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Property of TiNi Shape Memory Foils Produced by Ultrafine Laminates Method

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Abstract:

Using the ultrafine laminate method, thin foils (50 µm) of Ni-rich TiNi shape memory alloys were produced. Overall composition of the Ti/Ni laminate is Ti-50.7%Ni. TiNi (B2) phase was obtained after different diffusion treatments at 1073 K for 36 ks. Aging treatment at 773 K for 3.6, 18, 36, 72 and 144 ks were also performed. Phase transformation behavior of aged foils changed from two-step, to three-step and then to two-step transformation, which is similar to the case of bulk TiNi alloys. Uniform distribution of Ti3Ni4 phase was observed for aged samples by transmission electron microscopy. Two-way shape memory effect of the aged TiNi foil was also demonstrated.

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Periodical:

Materials Science Forum (Volumes 449-452)

Pages:

1321-1324

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.1321

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Online since:

March 2004

Authors:

Koichi Tsuchiya, Dacian Tomus, Minoru Umemoto, Masahiro Sasaki, Toshiki Ohmori

Keywords:

Diffusion, Martensitic Transformation (MT), Nickel Ni, Shape Memory Alloy Actuator, Titanium (Ti)

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© 2004 Trans Tech Publications Ltd. All Rights Reserved

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