Question

In cold rolling process, no any residual stresses are induced in the material during the operation.

(a) True

(b) False

I had been asked this question in examination.

Origin of the question is Cold Rolling topic in chapter Mechanical Working of Metals of Casting-Forming-Welding II

Answer 1

Right option is (b) False

Best explanation: In cold rolling process, strain hardening occurs during the expansion or compression of metal plate, which increases the value of flow stress, so that the required rolling force increases, which further lead to inducing of residual stresses in the material. This residual stresses then can be removed from the material by the annealing process.