Fracture toughness of G550 sheet steels subjected to tension

摘要

Tension tests of thin G550 sheet steels have shown that coupon specimens, which were obtained from blanks positioned transverse to the rolling direction, fail suddenly soon after yielding has occurred,. With minimal plastification of the cross-section. In previous reports the authors have concluded that the ability of G550 sheet steels to undergo deformation is depen- dent on the direction of load within the material, where transverse specimens exhibit the least amount of overall, local and uniform elongation.