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Customer
Service: Glossary
of Aluminum Terms
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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 exhibit 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 per unit of original
cross section at which, in soft steel, a marked increase in
deformation occurs without increase in load.
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Yield Strength |
A property of the material that
describes the stress at which the material exhibits a specified
permanent set. That is the point at which it will not spring back to
its original length when stress on the material is relieved. For
aluminum the yield strength is usually measured at the point where
the stress applied to the material causes a 0.2% (of the gauge
length) permanent set. |
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Young's Modulus |
The coefficient of elasticity of
stretching. For a stretched wire, Young's Modulus is the ratio of
the stretching force per unit cross-sectional area to the elongation
per unit length. The values of Young's Modulus for metals are of the
order 10(12) dynes per square cm. |
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