Investigations on Sheared Edge Damage of Dual-Phase 780 Steel

摘要

One of the concerns related to the utilization of Advanced High Strength Steel (AHSS) in stamping operations is the failure evolving from sheared blanked edges, so called edge cracking. It is well known that the edge condition after the blanking operation has a significant effect on edge stretching performance of AHSS and different edge conditions can be produced by using different shearing parameters. For the best cutting practice it is important to identify if there is a dominant edge characteristic such as rollover, shear, fracture or burr that can be responsible for the differences in edge stretching performance. The aim of this study was to analyze how different edge conditions produced by different cutting angles affect the edge stretching performance and also to understand the plastic deformation mechanism that occurs at the sheared edge during edge stretching.