THERMOMECHANICAL BEHAVIOR OF AN FE-BASED SHAPE-MEMORY ALLOY - TRANSFORMATION CONDITIONS AND HYSTERESES

Transformation/thermomechanical behavior in an Fe-9%Cr-5%Ni-14%Mn-6%Si polycrystalline shape memory alloy during thermomechanical loading is investigated. The transformation lines in the stress-temperature plan e are strongly influenced by the parameters characterizing the thermom echanical loading. The transformation start condition, the martensite start stress and the austenite start temperature, is carefully measure d to compare the results with the other experimental and theoretical o bservations. The stress-strain-temperature hysteresis loops, full and sub, are determined during cyclic loading.