Focus: To understand the interaction between transformation and viscoplastic mechanisms by conducting thermomechanical experiments and microstructural
studies, and to develop constitutive models which account for these interactions.
Thermomechanical experiments are performed on High Temperature SMAs (HTSMAs) using a quartz furnace,
extensometer, and grips. Test temperatures often range up to 600°C (compared to <100°C for conventional SMAs).
At these temperatures, viscoplastic effects become prominent
and the associated strains are measured to calibrate and validate the rate-dependent constitutive models. The constitutive equations are implemented
in ABAQUS and used to predict the behavior of HTSMAs at different temperature rates.