日本金属学会誌

J. Japan Inst. Metals, Vol. 69, No. 8 (2005),
pp. 604-607

An Experimental Study on Shape Memory Characteristics of Casted Ti-Ni Shape Memory Alloy

Kazuhiro Kitamura1, Toshio Kuchida2,, Tadashi Inaba2, Masataka Tokuda2 and Yukiharu Yoshimi3

1Department of Mechanical Engineering, Nagano National College of Technology, Naganao 381-8550
2Department of Mechanical Engineering, Faculty of Engineering, Mie University, Tsu 514-8507
3Yoshimi Inc. Obu 474-0002

Abstract:

The shape memory properties of a cast Ti-Ni shape memory alloy (SMA) were studied. Base materials were prepared as a melting method ingot and a self-propagating high-temperature synthesis (SHS) ingot. The composition of these ingots was Ti-50.5 at%Ni. Each ingot was cast into a rod shape by centrifugal casting. The heat-treatment conditions were 773 K for -1.8 ks and 873 K for -3.6 ks. Shape memory characteristics were measured by differential scanning calorimetry (DSC), X-ray diffraction (XRD) and a tensile test. All cast specimens have good shape memory characteristics. According to DSC measurements, the specimens made by melting show gravity segregation.


(Received 2005/3/16)

Keywords:

titanium-nickel, shape memory alloy, casting alloy


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