PLASTIC DEFORMATION

Plastic Deformation

• When you put force on an item, it changes its size or shape in a way that can't be reversed. This is called plastic deformation.

Deformation of plastic can be seen in many things, such as:

1. Plastics
2. Metals
3. Soils
4. Concrete

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• Different things cause plastic distortion in very different ways. Dislocations are the cause of plasticity in metals.
• Microcracks sliding around in rigid materials like bone, concrete, and rock are what cause plasticity.

1. There are two main ways that metals can change shape through plastic deformation:

   1. Slip
   2. Twinining

    

   Slip and Twinning

• Slip is the most common way that metals change shape.
• Blocks of crystal slide over one another along different crystalline planes, which are called slip planes.
•  In twinning, the crystals take on an orientation that is the same as the orientation of the rest of the untwined grid in a clear and uniform way. To make things into the shape you want, you use pressure and heat.
• The stress speed changes the material quickly, and if the material can't adapt to the changes in its structure, it may break.
• When goods are made, plastic deformation is done with controlled heat and pressure.
• This lets the material adapt to changes in its structure and bend it bit by bit until it gets the shape that is wanted.
• Crystals, ceramics, and hard thermosetting plastics have very small amounts of plastic distortion.

 IMAGE SOURCE (THUMBNAIL)