Depending on the temperature and/or stress applied it is
possible to observe shape memory effects and/or superelasticity.

To determine what effects will be observed we need to look at
the temperatures at which the transformations occur and also
the stresses at which they would occur normally.

This animation explains the results.

Click Start to begin...

If too great a stress is applied then slip will occur and no shape
memory effects will be observed. However there must be sufficient
stress to induce the transformation to martensite so the stress
must be greater than the martensite induction stress.

Which line should have a postive gradient and which a negative? Click to check.

Slip becomes easier at higher temperature since dislocation motion is easier. The stress required to to induce martensite increases with temperature as explained via the Clausius-Clapeyron equation earlier

Superelastic effects only occur above As but the stress needed to
induce martensite must be less than that to induce slip.

Superelastic effects only occur above As but the stress needed to
induce martensite must be less than that to induce slip.