Which point on the stress strain curve occurs after the upper yield point?

Which point on the stress strain curve occurs after yield plateau? Explanation: After the yield plateau the curve will go up to its maximum limit of stress which is its ultimate point.

What happens at upper yield point?

The upper yield point designates the stress up to which no permanent plastic deformation occurs in a material under tensile loading. The material does undergo deformation, however after withdrawal of the tensile stress it returns to its original form.

What happens to the strain when the stress is reduced?

When stress is gradually increased beyond the elastic limit, the material undergoes plastic deformation. Ductile materials such as metals show a gradual decrease in stress with the increasing strain, which means they become easier to deform as stress-strain values approach the breaking point.

Which point on the stress-strain curve occurs before the upper yield point in stress-strain curve?

What are the reasons for the phenomenon of upper and lower yielding in the case of mild steel?

Stress has to be applied till the dislocation is free of the solute atmoshere. This happens at upper yield point. Once the dislactions are free, i.e., are unlocked (by the solutes), the stress required to move dislocation is lower and you get the lower Yield stress, i.e., Yield Drop.

What is yield point in stress-strain curve?

In materials science and engineering, the yield point is the point on a stress-strain curve that indicates the limit of elastic behavior and the beginning of plastic behavior. Below the yield point, a material will deform elastically and will return to its original shape when the applied stress is removed.

What is yield stress in stress-strain curve?

What is the cause of upper yield point in low carbon steel during stress-strain testing?

It is well-known that the yield point phenomenon in low carbon steels is caused by the dislocation locking mechanism by interstitial atoms such as carbon and nitrogen.