Question

When plastic deformation of a material occurs the material

Answer 1

Plastic deformation is irreversible because it cannot gain its original shape.

It means that the substance is stretched beyond its elastic limit.

Hard thermo-setting plastic have a very small plastic deformation range.

Due to the tensile stress, the elastic limit of the substance is broken down and deformation is achieved.

Answer 2

The answer is: ...is permanently deformed