Yield strength definition

Yield strength is the stress at which a specified amount of permanent deformation of a material occurs. When we apply stress to a material, it deforms. Some of the deformation is plastic and the material can recover when the stress is relieved. But some deformation is permanent and the material cannot recover from it.

As we apply more stress, there is more deformation. This plots on a curve in a somewhat linear, or proportional, way. But at some point, a bit more stress results in a lot more deformation, and this is the proportional limit of the material. Stress applied beyond this causes an increasing rate of deformation until the maximum or ultimate strength of the material is reached. Yield strength is the stress at which a specified amount of permanent deformation of a material occurs.

(continue reading…)

You might also like

Optimal Combination of STRENGTH and TOUGHNESS Optimal Combination of STRENGTH and TOUGHNESS Preceding...
Mild Steel - Properties and Uses What is Mild Steel ? Mild steel is a type...
Toughness What is Toughness ? Metals often show quite...
Metal Deformation Deformation In materials science, deformation...
Grab This Widget