Qualitative and quantitative evaluation of the interface in activated shape memory alloy composites

The interfacial quality of shape memory alloy (SMA) composites was experimentally evaluated by differential scanning calorimetry, and quantitatively calculated using a combination of Sittner's model and a composite cylinder model. Results have shown that the damage level of the interface in a heating process can be quantitatively evaluated by measuring the transformation enthalpy of the subsequent heating cycle and comparing it with the S-shaped enthalpy kinetic curve. A combination of Sittner's model and a composite cylinder model is capable of calculating both the thermal behavior and the triaxial stress state of SMA composites.