Abstract
This article investigated the weldability, metallurgical and mechanical properties of Inconel 625 and AISI 316L stainless steel weldments obtained by continuous current (CC) and pulsed current (PC) gas tungsten arc welding (GTAW) processes employing ERNiCr-3 and ER2209 fillers. Microstructure studies showed the migrated grain boundaries at the weld zone of ERNiCr-3 weldments and multi-directional grain growth for ER2209 weldments. It was inferred from the tension tests that the fracture occurred at the parent metal of AISI 316L in all the cases. Charpy V-notch impact tests accentuated that the CCGTA weldments employing ERNiCr-3 filler offered better impact toughness of 77 J at room temperature. Further a detailed study has been carried out to analyze the structure — property relationships of these weldments using the combined techniques of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis.
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Recommended by Associate Editor Ji Weon Kim
K. Gokul Kumar received his Bachelor’s degree in Mechanical Engineering 1990 and Master’s Degree in Design during 2000 from University of Madras. He is currently pursuing his Ph.D. in the area of characterization of dissimilar weldments in VIT University. He has published five pioneered International journal papers. He is currently serving as Assistant Director (Students welfare) at VIT University.
K. Devendranath Ramkumar received his Bachelor’s degree in Mechanical Engineering in 2001 and Masters and Doctoral Degree from VIT University in the year 2004 and 2012 respectively. He has published more than 35 research papers in the pioneered International Journals.
N. Arivazhagan obtained his B.E. degree in Production Engineering from University of Madras in 1997. He received his Master’s Degree M.E. in Industrial Metallurgy from NIT Warangal in 2002 and PhD from IIT Roorkee in 2007. His areas of interest are dissimilar metal welding, high temperature corrosion and welding metallurgy. He has published more than 50 International Journal Papers. He is currently serving as Professor in the School of Mechanical & Building Sciences at VIT University.
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Kumar, K.G., Ramkumar, K.D. & Arivazhagan, N. Characterization of metallurgical and mechanical properties on the multi-pass welding of Inconel 625 and AISI 316L. J Mech Sci Technol 29, 1039–1047 (2015). https://doi.org/10.1007/s12206-014-1112-4
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DOI: https://doi.org/10.1007/s12206-014-1112-4