Macroscopic stress-strain curve, local strain band behavior and the texture of NiTi thin sheets

The aim of the present study is to investigate the local strain band behavior in conjunction with the texture of NiTi thin sheets under mechanical loading. Firstly, we evaluate the transformation temperature by differential scanning calorimetry ( DSC) and the internal structure by transmission electron microscopy (TEM) for NiTi thin sheets. Next, we investigate the texture by the x-ray diffraction method for two NiTi thin sheets with different textures. Then, we measure the local strain distribution arising in NiTi thin sheets under uniaxial tensile loading. Finally, we discuss the 'mechanism of angle, nucleation and propagation for local strain band' and the 'relationship between the macroscopic stress-strain curve and local strain band behavior' on the basis of results in the present study.