Publication Type : Journal Article
Publisher : Journal of Materials Engineering Performance
Source : Journal of Materials Engineering Performance, Volume 30, Pg. no. 6050-6057, May 2021
Url : https://link.springer.com/article/10.1007/s11665-021-05810-4
Campus : Chennai
School : School of Engineering
Center : Research & Projects
Department : Mechanical Engineering
Year : 2021
Abstract : This study examines the joining of a 4 mm thick plate of alloy C-2000 by continuous current gas tungsten arc welding (CCGTAW) and pulsed current gas tungsten arc welding (PCGTAW) techniques by using ERNiCrMo-4 (filler-4) and ERNiCrMo-17 (filler-17) as filler wires. This article aims to present a comprehensive structure-property relationship of these welded joints. Weld microstructure was characterized with optical microscope and scanning electron microscope. The results show that PCGTA weldments possess a refined microstructure compared to the CCGTA weldments in both filler wires. Energy-dispersive x-ray spectroscopy study divulged the existence of chromium (Cr)-rich and slight molybdenum (Mo)-rich segregation in the fusion zone interdendritic region of all the four weldments. However, the extent of microsegregation is very low in PCGTA-filler-4 weldment when compared with the other weld joints. Significant grain refinement (8.9 to 9.77%) was observed when shifting the welding mode from CCGTAW to PCGTAW. Weldment produced with PCGTAW-filler-4 offers higher tensile strength (~4 to 6%), higher toughness (~5 to 7.5%), and higher hardness (~3 to 6%) compared to other weldments.
Cite this Research Publication : Arulmurugan B, Balaji D, Kamaraj M, Mageshwaran V, Rajkumar S, Sathishkumar M, Manikandan M, Arivazhagan N. “Influence of filler wire and welding process to mitigate the microsegregation of alloy C-2000 using continuous and pulsed current gas tungsten arc welding techniques”, Journal of Materials Engineering Performance, Volume 30, Pg. no. 6050-6057, May 2021