Characterization of metallurgical and mechanical properties on the multi-pass welding of Inconel 625 and AISI 316L

KG Kumar, KD Ramkumar, N Arivazhagan - Journal of Mechanical …, 2015 - Springer
Journal of Mechanical Science and Technology, 2015Springer
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 …
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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