To improve the property of Cu-SMA (shape memory alloy) system in a cold district, molten alloy was produced by means of SHS method. It was determined that the shape memory behavior of the Cu-Al-Ni alloy, which was added to other elements in the base of the alloy, showed a different behavior than the base alloy.
The following results were obtained.
(1) A uniform Cu based shape memory alloy was prepared by use of exothermic reaction of Cu-Al-Ni.
(2) By the elemental addition of B or the mixture of B and C to a Cu-Al-Ni-Ti alloys, the reversible curve of shape memory behavior was improved in the lower temperature than 0 °C.
(3) A molten Cu-Al-Ni alloy formed in the uniform structure improved in performance in terms of the fracture strength and the deformed ratio.