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.

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    14 Discussions


    8 years ago on Introduction

    Is there any kind of muscle wire that works between room temperature and a cooler temperature?

    What happens if you bend it while it is still connected to the battery? Will it return to its shape?


    9 years ago on Introduction

    In the 80's my family owned a beer distributorship.  My brother was the general manager and he had a wire that he would pull out of his pocket straight, then hold a lighter to it, then it would change to spell out "Coors"


    Reply 11 years ago on Introduction

    that's actually how anti-scald faucets work. they have a stretched spring inside them, and when the water gets too hot it pulls it closed.


    11 years ago on Introduction

    Once again, cool. Are you a science/ chemistry teacher or something? You're a genius.