9 year old Emmarose learns about shape memory alloys
Emmarose is 9 and today she helped me with an experiment involving a special type of metal called a shape memory alloy.
For most metals, if they are bent or stretched out of shape, they stay that way.
Emmarose stretched the metal spring I gave to her into a long, stretched out spring. In the photo you can see the original spring on the right and the stretched one on the left.
Because the spring is made from a shape-memory alloy , when it is heated above a certain temperature it will return back to its original shape.
To prove this, we took a hair dryer and heated up the stretched spring and watched it go straight back to its original spring shape.