OS05W0303 Hybrid nano-characterization of martensitic transformation and degradation for Fe-Pd shape memory alloy using atomic and magnetic force microscopy

Abstract

Martensitic transformation and degradation characteristics for ferromagnetic shape memory alloy Fe-Pd were investigated by the developed hybrid nano-characterization technique using atomic force microscopy and magnetic force microscopy. Under loading cycles, degradation was detected both in AFM and MFM images before martensitic transformation temperatures changed. In AFM images surface topography became flat and in MFM images magnetic domain structures became unfocused with increasing number of cycles. Under thermal cycles, degradation was also detected in MFM images with increasing number of cycles. Then it was concluded that hybrid nano-characterization was very high sensitive technique to detect degradation under loading and thermal cycles for ferromagnetic shape memory alloy.