The burst character of thermoelastic shape-memory deformation in crystals of Cu–Al–Ni alloys

We have revealed and investigated the burst character of shape-memory deformation (SMD) in crystals of Cu–13.6 wt% Al–4.0 wt% Ni alloys. We have found that, after giving SMD to 8% when compressed in the direction of the [100] axis and subsequent heating on the solid base with an additional weight of 400 g, the system can rebound up to a height of 55 mm at a speed of $\approx$ 1 m/s. The calculations showed that, in the absence of load, a crystal with a weight of 0.8 g (in on absence of air friction) can rebound to a height of 27.5 m with a velocity of 23 m/s when rising from the base. The mechanism of such an unusual behavior of shape-memory deformation in this alloy was studied.