The degradation depth of electrical steel sheets due to mechanical and laser cutting

Literature agrees that cutting may damage the electromagnetic properties of electrical steel sheets, notably along the cut edge. However, statements on the depth of the deterioration vary. An analysis of the different presented results would allow for a better consideration of the material degradation in the modeling of the electromagnetic properties of the cut steel sheet. To this aim, this paper analyzes and summarizes the deterioration depths presented in the literature. It not only provides an overview of the quantitative results, but also on the respective measurement method used, since every technique used only provides an image of some of the aspects of the cut material affected by the cutting process.