TY - JOUR N2 - This paper presents an investigation into effect of nitrogen content of shielding gas mixture on weld geometry, microstructure and hardness of pulsed laser welded 2205 duplex stainless steel. Full penetration autogenous welding was performed on 2 mm thick plates using a low power pulsed Nd: YAG laser. light and scanning electron microscopy were used to study the resulting microstructures. It is observed that 2 mm full penetrated joint decreases to 1.8 mm by dominating nitrogen in argon-nitrogen mixture. Different morphologies of austenite phase as well as an increase of 8% of its content can be observed in pure nitrogen shielded welds. Average weld grain size in sample which is welded in nitrogen atmosphere stands at approximately 41 μm which is smaller than that of argon atmosphere which is about 51 μm. Micro-hardness test reveals that hardness values increase from 280 HV in base metal to 307 HV in weld center line and the shielding gas mixture does not significantly influence the weld hardness. L1 - http://journals.pan.pl/Content/117804/PDF/AMM-2021-1-24-Farnia.pdf L2 - http://journals.pan.pl/Content/117804 PY - 2021 IS - No 1 EP - 195 DO - 10.24425/amm.2021.134775 KW - low power pulsed Nd:YAG laser welding KW - duplex stainless steel KW - shielding gas KW - nitrogen KW - austenite formation A1 - Hajibaba Gozarganji, E. A1 - Farnia, A. A1 - Ebrahimnia, M. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 66 DA - 2020.12.22 T1 - Effect of Shielding Gas Composition on Geometry and Austenite Formation in Low Power Pulsed Nd:YAG Laser Welded 2205 Duplex Stainless Steel SP - 187 UR - http://journals.pan.pl/dlibra/publication/edition/117804 T2 - Archives of Metallurgy and Materials ER -