Question

A general stress-strain curve of any material represents the plasticity below the yield point.

(a) True

(b) False

The question was asked by my college professor while I was bunking the class.

My enquiry is from Behaviour in Metal Forming in chapter Forming Process of Casting-Forming-Welding II

Answer 1

The correct choice is (b) False

Best explanation: In the stress-strain curve of any material exhibits plasticity or strain hardening above the yield point. And below the yield point, the area represents the elasticity of the material. Yield point is only present in the stress-strain curve of ductile materials. In brittle materials, yielding does not take place during the application of load; it directly shows the fracture failure.