Abstract
The aim of present study is to investigate the mechanism of deformation for single crystal NiMnGa foil. Firstly, we prepare two types of NiMnGa specimen. One is as-received single crystal NiMnGa foil and the other is trained one after cyclic thermo mechanical loadings. Then, we attempt to measure macroscopic stress-strain curve and local strain distribution under uniaxial tensile loading for single crystal NiMnGa. At this time, we use the in-house measurement system on the basis of digital image correlation to measure local deformation behavior, and also use the laser speckle extensometer to measure strain from point to point in a part of specimen.
