Investigations of high load actuators based on Shape Memory Alloys

Inhalt:
Actuators based on Shape Memory Alloys (SMA) are suitable for generating actuating movements can be used in machine tool engineering. For the investigations, a suitable Ni-Ti-Cu alloy was available as bar material. At first DSC measurements were performed. Second fatigue investigations under compressive loading with a large number of cycles were carried out on the Ni-Ti-Cu alloy in the martensite and austenite region. Overall, a stabilizing behavior of the SMA samples can be observed over a large number of cycles. Due to the relatively small differences in phase transformation temperatures and the resulted stabilizing behavior, a suitable, homogeneous SMA material is thus available for the construction of high load actuators.