Introduction: How to Demonstrate Temperature Properties of Muscle Wire (Nitinol)
Sometimes called the Smart Alloy, Muscle Wire or Memory Metal, is an alloy that "remembers" it shape. You can reshape the wire, but when heated it returns to the preset shape. Ever wonder how someone bends a spoon with their mind? Same metal.
This demo straighten the spring so it is suined. Then attach a battery to it and it goes back to the spring shape.