抄録
Cu and Fe shape-memory alloys, as well as Ni-Ti shape-memory alloys, have been developed thus far ; however, their workability is poor and it is difficult to accurately control their transformation temperature. An attempt has been made to improve the drawability of shape-memory alloy wire by conventional wire drawing and roller die drawing. We prepare Fe, Ni-Ti and Cu shape-memory alloy wires. The results are summarized as follows, 1) Under optimum drawing conditions, the drawing limit of Ni-Ti shape-memory alloy wire could be raise by up to 70%. 2) By removing the brittle layers on the Fe alloy wire surface, thereby, the drawability can be improved. 3) The shape-memory alloy wires obtained are expected to be applied to various fields, such as springs that can be used as actuators, and washers for easy-release screws.
