What Is a Reversible Transformation?
A reversible transformation is a repeatable phase change that occurs without causing permanent damage to a material. In shape memory alloys (SMAs), this term typically refers to the thermally or stress-induced transition between martensite and austenite phases.
Role of Reversible Transformation in Actuation
This reversible solid-state transformation allows SMAs to undergo cyclic deformation and recovery, which is essential for actuation and sensing applications. When the material is cooled or mechanically loaded, it transforms into martensite; when heated or unloaded, it reverts to austenite. Because this process is reversible, it can be repeated over many cycles with minimal degradation, enabling reliable cyclic actuation and functional fatigue resistance.
RVactuators can achieve axial strains of up to 10%
Thanks to optimized material processing and actuator design, RVactuators are able to achieve axial strains of up to 10%, exceeding typical long-life SMA strain levels while maintaining reliable cyclic performance. This capability enables compact, high-displacement actuators for demanding precision and motion-control applications.