Experimental and numerical study of the influence of slide burnishing on fracture resistance of advanced high-strength steels under stretch-bending conditions

Abstract

Advanced high strength steels (AHSS) play a critical role in the automotive industry due to their superior strength-to-weight ratio, enabling vehicle weight reduction while maintaining safety standards. However, their limited ductility and formability under complex loading conditions pose manufacturing challenges. Slide burnishing has emerged as a promising surface treatment technique to improve mechanical properties by inducing compressive residual stresses. In this context, the stretch-bending test is an effective method for evaluating fracture resistance in perforated AHSS sheets. This study investigates the influence of slide burnishing forces on the fracture displace - ment of two AHSS types: DP590-R and TRIP440-Y. An experimental design (3 2 ) was employed to evaluate the effect of three burnishing forces (125 N, 250 N, 400 N) and three punch diameters (3 mm, 6 mm, 12 mm) during stretch-bending tests. Numerical simulations using a finite element model with the Barlat anisotropic yield crite - rion accurately predicted thinning patterns near the hole, supporting experimental observations.