Springback Analysis of High Strength Dual-phase Steels

Car manufacturing was always the key industry behind sheet metal forming thus the requirements and developments in car manufacturing have decisive role in the development of sheet metal forming, too. The automotive industry faces with very contradictory demands and requirements: better performance with lower consumption and lower harmful emissions, more safety and comfort that are hardly available simultaneously with conventional materials and conventional manufacturing processes. These requirements are the main driving forces in the automotive industry and in the material and technological developments in sheet metal forming, as well. During the recent years significant developments can be observed in the application of high strength steels. In this respect the application of various dual-phase steels is one of the best examples to meet these contradictory requirements. However, the application of these high strength steels often leads to formability problems. Among them the springback occurring after sheet metal forming should be mentioned first. In this paper, some recent results will be given obtained by using the new device together with a sensitivity analysis done by numerical simulation