ATOMIC FORCE MICROSCOPE STUDY OF STRESS-INDUCED MARTENSITE FORMATION AND ITS REVERSE TRANSFORMATION IN A THERMOMECHANICALLY TREATED Fe-Mn-Si-Cr-Ni ALLOY

摘要

Consecutive observations of the stress-induced martensite formation and its reversion by atomic force microscopy have been carried out for the fcc/hcp transformation in the thermomechanically treated sample of an Fe-Mn-Si-Cr-Ni shape memory alloy. It is found that thin martensite plates of 0.1-0.2 μm thickness, which are the same martensite variant on the same habit plane, are formed one after another at the immediate neighbor of the existing martensite plate.