If we fix one end of a spring and apply some force on the free end,the spring will elongate.If we remove the force,the spring will return to its original length(assume that Hooke's law is obeyed).
Metals are usually ductile due to their metallic bonds.In metallic bonds valence shell electrons are delocalized and shared between many atoms. The delocalized electrons allow metal atoms to slide past one another without being subjected to strong repulsive forces that would cause other materials to shatter.
So,my question is:
1)Why the spring is not ductile,consider a spring which is made of gold,
even if you pull it with a small force,it will deform and it will not return its initial structure.
Is it because the spring is not made by pure metal?Is it made by some alloys or
any other substances?
2)Why does a spring return to its original structure when the force is removed?
What's happened between the inter-atomic bondings?
Thx a lot :)
The Attempt at a Solution
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