Question

In the tube drawing process, no any residual stresses are induced in the tube material.

(a) True

(b) False

I have been asked this question in class test.

My question comes from Tube Making in chapter Miscellaneous Forming Processes of Casting-Forming-Welding II

Answer 1

Correct choice is (b) False

To explain I would say: In the tube drawing process, the deformation is usually uniform throughout the tube. The process is a cold working process which causes residual stresses in the tube material. In general, the longitudinal residual stresses are tensile on the exterior surface and compressive on the interior surface of the tube.