Multi-scan laser bending of duplex stainless steel under different cooling conditions

This study focuses on the effect of three different cooling conditions during multi-scan laser bending of duplex stainless-steel sheet. Results show that the trend of temperature distribution with number of scans is almost similar in all three conditions, but the peak temperature changes. The bend angle, heat affected zone, tensile strength and hardness are significantly affected by the cooling condition. The tensile strength and hardness of scanned specimen is increased compare to base material in all three cooling conditions. The microstructure shows grain refinement and sigma phase formation at the top and bottom surfaces, re-spectively, in all three cooling conditions.(c) 2022 CIRP.