Glosssary of Corrosion Related Terms

To search the glossary simply click on the desired letter below to view a complete list of all the terms under that listing.

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Yield
Evidence of plastic deformation in structural materials. Also called plastic flow or creep. See also flow.

Yield point
The first stress in a material, usually less than the maximum attainable stress, at which an increase in strain occurs without an increase in stress. Only certain metals - those that exhibit a localized, heterogeneous type of transition from elastic deformation to plastic deformation - produce a yield point. If there is a decrease in stress after yielding, a distinction may be made between upper and lower yield points. The load at which a sudden drop in the flow curve occurs is called the upper yield point. The constant load shown on the flow curve is the lower yield point.

Yield strength
The stress at which a material exhibits a specified deviation from proportionality of stress and strain. An onset of 0.2% is used for many metals.

Yield stress
The stress level in a material at or above the yield strength but below the ultimate strength, i.e., a stress in the plastic range.





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