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Related to plastic deformation: ductility
plastic deformation[′plas·tik ‚dē‚fȯr′mā·shən]
Permanent change in shape or size of a solid body without fracture resulting from the application of sustained stress beyond the elastic limit.
plastic flow, plastic deformation
The deformation of a plastic material beyond the point of recovery, accompanied by continuing deformation with no further increase in stress; results in a permanent change in shape.