Pseudoelastic cycling in Cu–14.3Al–4.1Ni (wt.%) single crystals

Pseudoelastic β1↔β′1 and β1↔β′1+γ′1 cycling in Cu–14.3Al–4.1Ni (wt.%) single crystals were performed. For the β1↔β′1 cycling no evolution of the stress-strain curves was observed up to N=2700 in a specimen oriented close to the [100] direction. For the β1↔β′1+γ′1 cycling, made in a sample with orientation near [110], the martensitic transformation changes with the number of cycles, showing a clear inhibition of the γ′1 martensite as the cycling progresses. The disappearance of the 2H martensite is discussed in terms of the introduction of defects during cycling.