What Is Martensitic Transformation?
The martensitic transformation is a solid-state, diffusionless phase change involving coordinated atomic motion within a material’s crystal lattice. In shape memory alloys (SMAs), this transformation occurs between the martensite and austenite phases and is fully reversible under appropriate thermal or mechanical conditions.
Martensitic Transformation and Actuation
This diffusionless nature allows the transformation to occur rapidly without long-range atomic diffusion, making it ideal for cyclic and high-speed actuation. The martensitic transformation is the fundamental mechanism responsible for both the shape memory effect and superelasticity, enabling SMAs to recover large strains and generate mechanical work. As a result, it plays a central role in SMA actuators, sensors, and adaptive systems.