Title: Microstructure and mechanical study of SDSS thin sheet welded by CCTIG and PCTIG process

Authors: Sujeet Kumar; K.E.K. Vimal

Addresses: Department of Mechanical Engineering, National Institute of Technology Patna, Patna-800 005, India ' Department of Mechanical Engineering, National Institute of Technology Patna, Patna-800 005, India

Abstract: In this research paper, effects of pulsed current tungsten inert gas (PCTIG) welding process over constant current tungsten inert gas (CCTIG) welding process on the quality of weld joints produced in super duplex stainless steel material were investigated. Microstructure obtained by PCTIG welded joints is 40% more in number as compared to CCTIG welded joints which indicate finer grain structure in the weld zone of PCTIG welded joint. The tensile strength of CCTIG welded joints shows 8% of reduction and PCTIG welded joints shows 6.4% reduction as compared to the base metal. A three-point bending test was performed and found a 2° more bend angles for PCTIG welded joint. ABAQUS software is used to perform the tensile test and three-point bend test to validate the experimental work. The simulated and experimented results for the microstructures analysis, tensile test, and three-point bending test are comparable with each other.

Keywords: super duplex stainless steel; tungsten inert gas; microstructures; tensile test; numerical simulation.

DOI: 10.1504/IJMATEI.2025.147590

International Journal of Materials Engineering Innovation, 2025 Vol.16 No.3, pp.197 - 213

Received: 09 Feb 2023
Accepted: 06 Apr 2023
Published online: 24 Jul 2025 *

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