what is strain hardeningin stress-strain curve

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Strain hardeningprocess

Conclusion:- After deformation when test is done on plastically deformed component, it has higher yield stress than undeformed component.

When plastic deformation starts generating more and more dislocation, one dislocation comes in the way of other and they start interfering in each other’s motion making it difficult to motion which results in Strengthening.

What is strain hardeningused for

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What is strain hardeningformula

1===>Consider a uniaxial tensile test, when a component is subjected to tensile load it deforms elastically till elastic limit.

4===>Now that component is still not broken so if we repeat the tensile test on the same component then we can observe that yield stress for deformed component is increased due to plastic deformation, further up to point where we have started unloading(3).

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2===>Then the curve becomes nonlinear and plastic deformation begins. In this case assume that component is deformed beyond yield stress but stopped much before fracture point.