Abstract
In this study, dissimilar 316L austenitic stainless steel/2205 duplex stainless steel (DSS) joints were fabricated by constant and pulsed current gas tungsten arc welding process using ER2209 DSS as a filler metal. Microstructures and joint properties were characterized using optical and electron scanning microscopy, tensile, Charpy V-notch impact and micro-hardness tests, and cyclic polarization measurements. Microstructural observations confirmed the presence of chromium nitride and delta ferrite in the heat-affected zone of DSS and 316L, respectively. In addition, there was some deviation in the austenite/ferrite ratio of the surface welding pass in comparison to the root welding pass. Besides having lower pitting potential, welded joints produced by constant current gas tungsten arc welding process, consisted of some brittle sigma phase precipitates, which resulted in some impact energy reduction. The tensile tests showed high tensile strength for the weld joints in which all the specimens were broken in 316L base metal.
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The authors would like to express their gratitude to the academic staff of the Materials Engineering Department of Islamic Azad University of Ahwaz and Sadid Jahan Sanat Company for their cooperation during these experiments.
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Neissi, R., Shamanian, M. & Hajihashemi, M. The Effect of Constant and Pulsed Current Gas Tungsten Arc Welding on Joint Properties of 2205 Duplex Stainless Steel to 316L Austenitic Stainless Steel. J. of Materi Eng and Perform 25, 2017–2028 (2016). https://doi.org/10.1007/s11665-016-2033-4
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DOI: https://doi.org/10.1007/s11665-016-2033-4