Physical and technical potential of shape memory single crystals for applications in
rotary actuators was experimentally studied. Single-crystalline Cu-Al-Ni cylindrical rods for
tests and actuator applications were grown from melt by Stepanov method. The crystals were
tested by tension under conditions simulating their work in the proposed design of a rotary
actuator. Actuator performance parameters such as rotation angle, torque and useful work
were estimated basing on experimental results. Actuators employing shape memory effect
outperform conventional electric motors and actuators in terms of specific work output.
Keywords: Cu-Al-Ni single crystal; shape memory; rotary actuator.
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