抄録
Martensitic transformation and degradation characteristics for Fe-Pd ferromagnetic shape memory alloy were investigated by the developed AFM (Atomic Force Microscopy)/MFM (Magnetic Force Microscopy) hybrid nano-characterization technique. Martensitic transformation characteristics such as martensitic transformation temperature, reverse transformation temperature and morphology of martensitic phase for Fe-Pd alloy were detected by the changes in AFM and MFM images at microscopic or nanoscopic area. Degradation characteristics under cyclic loading at room temperature were also detected by the changes in AFM and MFM images. Especially in MFM the images became unfocused with increasing number of cycles although average martensitic transformation temperature changed slightly. Then it was found that the hybrid nano-characterization was high-sensitive technique to detect degradation under cyclic loading for ferromagnetic shape memory alloy.
