Abstract
The superelastic properties of cast Ti -Ni shape memory alloy (SMA) were studied. Base materials were prepared as a melting method ingot and as a self-propagating high-temperature synthesis (SHS) ingot. The composition of these ingots was Ti-50.8 at%Ni. Each ingot was cast into a rod shape by centrifugal casting. The heat-treatment conditions were 773K for-1.8ks and 773K-1.8ks → 873K-3.6ks. Shape memory characteristics were measured by differential scanning calorimetry (DSC), X-ray diffraction (XRD) and a tensile test. All casting specimens have good shape memory characteristics. According to DSC measurements, the melt method specimens show gravity segregation.
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