Abstract
The two way shape memory effect (TWME) refers to the transformation from the beta phase to the martensitic phase with an associated shape change without the application of external forces. This shape change implies the preferred nucleation or growth of some few martensitic variants. For this to happen it is necessary to do some prior kind of training. It was shown that allowing the martensite to stabilize under compressive stresses, the TWME is induced and there is no need of thermomechanical cycling. In this work the relevance of the velocity of heating in the degradation of the TWME subjected to high temperatures is reported and discussed. The sample used was a single crystal of Cu-Zn-Al with a Ms of 32 C and composition 68.9 at%Cu, 14.1at%Zn, 16.9at%Al. The sample was of compression type, cylindrical of 9.46 mm length and 4.70 mm in diameter.
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