Experimental characterization of forming behavior of 3rd GEN AHSS

Abstract Third generation of Advanced High Strength Steels (3rd GEN AHSS) for cold stamping combine superior formability and ductility at higher strengths. Their combination with the Laser Welded Blanks (LWB) technology is one answer to improve safety weight reduction vehicules automakers. In this study, a Nakazima test used evaluate forming behavior LWB based 3rd AHSS estimate their Forming Limit. Tests equipped Digital Image Correlation (DIC) system are carried out several materials combinations in order understand influence weld on formability. The experimental results determine critical area during dedicated FLC each material combination. location onset failure investigated, from optical observations, DIC data as well modeling. It appears that different locations obtained depending both strain paths. accuracy determination failure, method proposed risk base metal vicinity weld. improvement prediction will be very helpful analyze part provide design recommendations.