What Is a Structural Transition?
A structural transition describes a phase change from a thermodynamic perspective, emphasizing how a material’s structure responds to external variables such as temperature, applied stress, or magnetic field. In shape memory alloys (SMAs), structural transitions govern the conditions under which the material shifts between the martensite and austenite phases.
Role of Structural Transition in SMA Actuation
Unlike the term structural transformation, which focuses on atomic rearrangement mechanisms, structural transition highlights the energy landscape and driving forces behind the phase change. Understanding structural transitions is essential for predicting transformation temperatures, hysteresis behavior, and actuation performance in SMA-based actuators, sensors, and adaptive systems.