Abstract
Super duplex stainless steel (SDSS), an advanced duplex stainless steel with higher alloying concentration, is employed widely in acidic atmospheres. In this study, we make an attempt to develop a process window for the pulsed mode Nd:YAG laser welding of SDSS, as reference maps, to identify the range of process parameters viz., laser power, welding speed, defocusing distance, and pulse frequency for obtaining a defect free full penetration welds. The eminence of the welds, based on the macrostructure, microstructure, and tensile strength, is reported. We obtain a complete penetration weld devoid of undercut, crating at the top and minimum heat affected zone (HAZ) with a overlapping factor of 80–90% and heat input at 100–200 J/mm. The experimental settings prevailing inside the preferred region of the process window exhibit a higher tensile strength as well.
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Sivagurumanikandan, N., Saravanan, S., Sivakumar, G. et al. Process Window for Nd:YAG Laser Welding of Super Duplex Stainless Steel. J Russ Laser Res 39, 575–584 (2018). https://doi.org/10.1007/s10946-018-9754-9
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DOI: https://doi.org/10.1007/s10946-018-9754-9