MECHANICAL BEHAVIOUR AND FRACTURE OF SOME HSLA STEELS - 2. A DISCUSSION OF THE MODES OF FRACTURE OBSERVED DURING THE FORMING OF HSLA STEELS.

The tendency to localized deformation and the strain to failure are also parameters of relevance to formability. In hot-rolled HSLA steels cumulative damage in the form of void initiation and growth can occur during some forming operations not only at nonmetallic inclusions but also at the islands of nonferritic products which are inherent in processing. The tendency to both localized shear failure and delamination is enhanced due to the increased yield strength of these materials.