Fig. 2: Overview of phase transformation mechanisms of SMA materials.
From: Wire-form shape memory alloy actuators: modeling, design, and control

a Shape memory effect (SME), b Superelasticity (SE), and c actuation and reset process
From: Wire-form shape memory alloy actuators: modeling, design, and control

a Shape memory effect (SME), b Superelasticity (SE), and c actuation and reset process