plastic deformation


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Related to plastic deformation: ductility

plastic deformation

[′plas·tik ‚dē‚fȯr′mā·shən]
(mechanics)
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.
References in periodicals archive ?
2010): The hardness analysis of the if steel sheet after a plastic deformation.
The nature of distribution of microhard-ness in the thickness of the surface layers indicates that the effect of the surface plastic deformation in the treatment of the lock is evident at a depth of up to 80 [micro]m.
Plastic deformation in the form of a concave deformation pattern was observed along the scratch direction.
These energy-absorbing mechanisms are numerous, and include crack deflection, crack pinning, cavitation, and others (Figure 4); but the most important of them is the plastic deformation of material around the crack tip.
Closer observation also suggests that high plastic deformation probably leads to the cracking of the material during the wear process.
All curves had an initial expansion (upward movement of TDC) before plastic deformation (downward movement of TDC).
Thus, relatively large indentation forces and depths are normally applied to a reference material that either has a high modulus or exhibits significant plastic deformation, i.
In contrast, the Alloy 825 specimens fractured by plastic deformation under all test conditions.
The two other mechanisms involve plastic deformation of some form: either shear yielding or cavitation.