Question

When plastic deformation of a material occurs, the material _____. regains its original shape when the stress is removed is permanently deformed becomes magnetic at low temperatures becomes highly resistant to stress

Answer 1

the answer is permanetly deformed

Answer 2

Answer: Is permanently deformed.

Explanation (see the diagram shown below).
For most structural materials:
(a) The deformation in the elastic zone is recoverable, and the material returns
to its original shape when the load (or stress) is removed.
(b) A permanent set (non-recoverable deformation) occurs when the material
is sressed beyond the elastic zone, that is, in the plastic zone.