Characterization of the structure and substructure of thermally transformation cycled Cu-Zn-Al shape memory alloys

Abstract

Samples of a Cu-Zn-Al shape memory alloy were thermally cycled up to 10 times, using a differential scanning calorimeter, between the parent and martensite phases. The trends of transformation temperature versus number of cycles were correlated with observed microstructure . Specimens were examined through transmission electron microscopy techniques. The character of lattice defects and residual structures in the parent phase provided an understanding of substructural conditions enhancing martensite formation and reversion.