Abstract
In this paper, the results of recent studies on conversion of the orthodontic wires into the shape memory alloys usable in smart composite materials via annealing and constrained ageing are presented. Electrical resistively of the NiTi orthodontic wires have been measured before and after annealing at 850 and 1000 C for1hr. Comparable results obtained by the differential scanning calorimeter (DSC) and the electrical resistively measurements indicated reliability of both methods and the ECR machine constructed during this research. Based on the experimental results, the constrained ageing resulted in appearance of two-way shape memory behavior which allowed the recovery of appropriate shapes at different temperatures applied to the alloy. This property could be used in manufacturing of the medical actuators.
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