What is work hardening? Note that only
cold work is effective in producing work hardening. Why is it a strengthening mechanism?
Sigma_y_0 = undeformed yield strength
When you deform at room temperature, eleastic strain is recovered but the plastic deformation is not. TO deform again we need to start from sigma_y_1. See slide 10.
%CW = (t_0 - t_f)/t_0 * 100