J. Phys. IV France 112 (2003) 877
Shape memory effect in Ti-Ni alloy thin sheets/foils produced via ultrafine laminatesD. Tomus1, K. Tsuchiya1, M. Inuzuka1, M. Sasaki2, D. Imai2 and M. Umemoto1
1 Department of Production System Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580, Japan
2 Nippon Metal Ind. Co. Ltd., Sagamihara, Kanagawa 229-1184, Japan
ln the present paper, we describe a new processing method to produce thin foils of TiNi shape memory alloys starting from ultrafine laminates of pure Ti and Ni. The final thickness of the Ti/Ni laminate is 100 or 50 m after hot and cold rolling. The laminates are diffusion treated at 1073-1173 K to obtain TiNi B2 phase. Some samples are further subjected to low temperature aging at 673-773 K in order to study two-way shape memory effect. The shape memory strain in foils with 50 m thickness is about after diffusion treatment. Two-way memory of was also found in 50 m foils.
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