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K. Gokul Kumar,K. Devendranath Ramkumar,N. Arivazhagan 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.3
This article investigated the weldability, metallurgical and mechanical properties of Inconel 625 and AISI 316L stainless steel weldmentsobtained by continuous current (CC) and pulsed current (PC) gas tungsten arc welding (GTAW) processes employing ERNiCr-3and ER2209 fillers. Microstructure studies showed the migrated grain boundaries at the weld zone of ERNiCr-3 weldments and multidirectionalgrain growth for ER2209 weldments. It was inferred from the tension tests that the fracture occurred at the parent metal ofAISI 316L in all the cases. Charpy V-notch impact tests accentuated that the CCGTA weldments employing ERNiCr-3 filler offeredbetter impact toughness of 77 J at room temperature. Further a detailed study has been carried out to analyze the structure - property relationshipsof these weldments using the combined techniques of scanning electron microscopy (SEM) and energy dispersive spectroscopy(EDS) analysis.