Question

Over work hardening of material can induce high brittleness in the material.

(a) True

(b) False

I got this question during an interview.

Question is taken from Cold Rolling in division Mechanical Working of Metals of Casting-Forming-Welding II

Answer 1

The correct answer is (a) True

For explanation: When the material is processed by cold rolling then it loses its ductility by increasing its strength. The process includes strain hardening of the material which induces stresses in the material and when the process is continued and crosses the limit, then the material becomes very hard and brittle, which can only be overcome by annealing process.