This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionShape Memory Effect Animation.ogv
English: A short schematic designed to help you better understand the shape memory effect.
1. Cooling from austenite to (twinned) martensite, which happens either at beginning of the SMA’s lifetime or at the end of a thermal cycle
2. Applying a stress to detwin the martensite
3. Heating the martensite to reform austenite, restoring the original shape
4. Cooling the austenite back to twinned martensite (back to 1)
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the licence, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible licence as the original.