Original scientific paper

https://doi.org/10.21278/TOF.473048822

Effects of Gas Metal Arc Welding Variants on the Mechanical and Microstructural Characteristics of AISI 304 Stainless Steel

Karthick K orcid.org/0000-0002-9916-9783 ; KGiSL Institute of Technology, Coimbatore, India
Magudeeeswaran G ; PSNA College of Engineering and Technology, Dindigul, India

Abstract

The impact of variants of gas metal arc welding on the tensile properties of AISI-304 stainless steel is presented in this article. A single V-butt joint with a groove angle of 60° and thickness of 12 mm is fabricated by four gas metal arc welding variants, such as constant current, pulsed current, double pulsed current, and cold metal transfer, under optimized conditions. The tensile properties are analysed on the cross-sectional specimen of the welded joint. The highest tensile strength of 657 MPa is recorded on the specimen welded by the cold metal transfer. The highest elongation of 19% is observed on the specimen welded by cold metal transfer, while the elongation of base metal is 45%. The results show that the joints fabricated using the cold metal transfer have superior tensile properties to those fabricated by the other three variants of the gas metal arc welding process; this is due to the electromagnetic force exerted by this welding process. The joint fabricated using the cold metal transfer process has received a low heat input, resulting in high joint efficiency and notch strength ratio.

Keywords

AISI 304 stainless steel; gas metal arc welding; cold metal transfer; pulsed current; double pulsed current

Hrčak ID:

306096

URI

https://hrcak.srce.hr/306096

Publication date:

5.9.2023.

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