Affiliation:
1. National Institute of Materials Science
2. Monash University
3. Toyohashi University of Technology
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.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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