Here's how it works:
* Elastic Deformation: When a small force is applied, the metal will deform slightly but will return to its original shape when the force is removed. This is called elastic deformation.
* Plastic Deformation: When a larger force is applied, the metal will deform permanently. This is called plastic deformation. The metal will not return to its original shape even when the force is removed.
Examples of changing metal shape:
* Hammering: When a hammer strikes a metal object, it applies a force that causes plastic deformation, changing the shape of the metal.
* Bending: Bending a metal bar or wire applies a force that causes plastic deformation, changing its shape.
* Extrusion: In extrusion, a metal is forced through a die, changing its shape.
* Forging: Forging involves heating a metal and then shaping it using a hammer or press, which causes plastic deformation.
Factors affecting shape change:
* Type of metal: Some metals are more ductile than others. For example, gold is very ductile, while iron is less so.
* Temperature: Metals are more ductile at higher temperatures.
* Force applied: The amount of force applied will determine the extent of deformation.
Therefore, applying a great force to a solid metal can change its shape permanently through plastic deformation. This principle is used in various manufacturing processes to shape metal objects according to desired designs.
